14 Best Single Dumbbells for Home Strength Training in 2027

The best single dumbbells match the weight you need without taking more space or money than your workouts call for. I rank the Amazon Basics 20-Pound Rubber Hex Dumbbell as the best overall for its useful middle-heavy load and stable hex shape; the BowFlex Results Series SelectTech 552 stands out for adjustable range, while the Marcy Neoprene Dumbbell, 5 lb, Single suits light routines and a comfortable, colorful grip. The main tradeoff is choosing between a simple fixed weight, which is durable and quick to use, and an adjustable model, which saves space but adds moving parts. Weight selection matters just as much: a single dumbbell can serve one-sided exercises, but it is not a substitute for a pair when you need balanced two-arm movements. Read on for the full comparison and help matching a pick to your training.

Before you orderOffer from Amazon

Get workout gear delivered free with Prime

• Fast, free delivery on millions of items
• Prime Video, Amazon Music and more included
• Member-only deals all year

Start your free Prime trial →Free trial for eligible customers · Cancel anytime

As an affiliate, we earn on qualifying purchases.Hide

Complete the kit

Trailoom Microfiber Gym Towels, Quick Dry, Highly Absorbi…

Add to your setup →

Microfiber Quick Dry Gym Towel, Lint Free Odor-Free Absor…

Add to your setup →

Nomadix Fitness Towel- Microterry Quick-Dry Gym & Yoga Sw…

Add to your setup →

Key Takeaways

• The 20-pound amazon.com/dp/B074DZ5YL9?tag=thefitnessarsenal-20&ascsubtag=dc-1213673″ target=”_blank” rel=”nofollow sponsored noopener”>amazon.com/dp/B074DZ65J3?tag=thefitnessarsenal-20&ascsubtag=dc-1213673″ target=”_blank” rel=”nofollow sponsored noopener”>amazon.com/dp/B0DDKGFGSS?tag=thefitnessarsenal-20&ascsubtag=dc-1213673″ target=”_blank” rel=”nofollow sponsored noopener”>amazon.com/dp/B074DZ6NGS?tag=thefitnessarsenal-20&ascsubtag=dc-1213673″ target=”_blank” rel=”nofollow sponsored noopener”>Amazon Basics rubber hex is the strongest all-around fixed-weight choice in this group, sitting between the lighter 10- and 15-pound options and the heavier 25-pound models.
• BowFlex SelectTech 552 is the range-first pick: its adjustable design covers more training loads in one unit, but costs you the simplicity of a fixed dumbbell.
• Marcy’s neoprene lineup is concentrated at light weights, from 1 to 10 pounds, making it better suited to beginners, rehabilitation-style movements, and higher-rep accessory work than heavy strength training.
• Fixed rubber hex dumbbells trade adjustability for straightforward use; Amazon Basics offers several useful load steps, while Marcy‘s cast-iron hex line spans a much wider range.
• A single dumbbell is most useful for one-arm and asymmetrical exercises; buyers planning two-arm presses or matching hand weights should account for needing a second unit.

Our Top Best Single Dumbbells Picks

Marcy Neoprene Dumbbell, 5 lb, Single		Best for Light, Comfortable Training	Brand: Marcy	Weight: 5 lb	Quantity: 1 dumbbell	VIEW LATEST PRICE	See Our Full Breakdown
Amazon Basics 20-Pound Rubber Hex Dumbbell		Best Fixed Weight for Heavier Home Lifting	Brand: Amazon Basics	Weight: 20 lb	Quantity: 1 dumbbell	VIEW LATEST PRICE	See Our Full Breakdown
Marcy 6 lb Neoprene Dumbbell, Single		Best for a Small Step Up from Light Weights	Brand: Marcy	Weight: 6 lb	Quantity: 1 dumbbell	VIEW LATEST PRICE	See Our Full Breakdown
Amazon Basics Adjustable Dumbbell, 25 lb		Best Space-Saving Adjustable Pick	Brand: Amazon Basics	Weight settings: 5, 10, 15, 20, and 25 lb	Quantity: 1 dumbbell	VIEW LATEST PRICE	See Our Full Breakdown
Marcy Hammertone Cast Iron Hex Dumbbell, 3–100 lb, Single		Best Weight Range for Long-Term Progression	Brand: Marcy	Material: Cast iron	Available weights: 3, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 90, and 100 lb	VIEW LATEST PRICE	See Our Full Breakdown
Amazon Basics 10-Pound Rubber Hex Dumbbell		Best for Everyday Strength Training	Weight: 10 pounds	Quantity: 1 dumbbell	Construction: Rubber-encased cast iron	VIEW LATEST PRICE	See Our Full Breakdown
Marcy Neoprene Dumbbell, Single 2 lb		Best for Very Light Training	Weight: 2 lb	Quantity: 1 dumbbell	Materials: Cast iron, neoprene	VIEW LATEST PRICE	See Our Full Breakdown
Marcy Neoprene Dumbbell, 10 lb, Single		Best Neoprene Pick for a 10-Pound Load	Weight: 10 lb	Quantity: 1 dumbbell	Materials: Cast iron, neoprene	VIEW LATEST PRICE	See Our Full Breakdown
Marcy Classic Rubber Hex Dumbbell (5 lb, Single)		Best Compact Rubber Hex Pick	Weight: 5 lbs	Quantity: 1 dumbbell	Material: Cast iron, rubber	VIEW LATEST PRICE	See Our Full Breakdown
Marcy Colored Neoprene Dumbbell Hand Weight (3 lb, Single)		Best Light Neoprene Step-Up	Weight: 3 lbs	Quantity: 1 dumbbell	Material: Cast iron core, neoprene coating	VIEW LATEST PRICE	See Our Full Breakdown
BowFlex Results Series SelectTech 552 Adjustable Dumbbell		Best Adjustable Single Dumbbell	Brand: Bowflex	Model: BFW0023-OS	Weight range: 5–52.5 lbs per dumbbell	VIEW LATEST PRICE	See Our Full Breakdown
Amazon Basics 15-Pound Rubber Hex Dumbbell		Best Midweight Fixed Dumbbell	Brand: Amazon Basics	Weight: 15 pounds	Material: Cast iron with rubber coating	VIEW LATEST PRICE	See Our Full Breakdown
Marcy Neoprene Dumbbell, Single 1 lb		Best for Light-Toning Work	Brand: Marcy	Model: INE-001	Weight: 1 lb	VIEW LATEST PRICE	See Our Full Breakdown
Amazon Basics Rubber Hex Dumbbell, 25 lb		Best for Heavier Fixed-Weight Training	Brand: Amazon Basics	Weight: 25 lb	Material: Cast iron with rubber-encased heads	VIEW LATEST PRICE	See Our Full Breakdown

More Details on Our Top Picks

1. Marcy Neoprene Dumbbell, 5 lb, Single

   

   Best for Light, Comfortable Training

   View Latest Price

   The Marcy 5 lb Neoprene Dumbbell is a sensible choice for lighter arm work, movement practice, or adding modest resistance to a home routine. Its textured neoprene coating gives the handle a grippy feel, while the no-roll head is less likely to wander between exercises than a round weight. Compared with the Marcy 6 lb Neoprene Dumbbell, this is the gentler starting point for buyers who want a small step of resistance; the difference is modest, so neither replaces a set of progressively heavier weights. The coating also helps protect against rust, but it does not make this a heavy-duty strength-training option. I’d choose it for controlled, lighter sessions and skip it if you need a matched pair or expect to progress quickly.

   Pros:

   • Textured neoprene provides a secure-feeling grip
   • No-roll head stays put more readily between sets
   • Rust-resistant coating suits regular home use
   • Other weights in the Marcy neoprene line are available separately

   Cons:

   • Sold as one dumbbell, so two-handed or matched-pair work requires another purchase
   • Fixed 5 lb weight limits its usefulness for progressive strength training

   Best for: Home exercisers who want one light, grippy dumbbell for arm exercises, rehabilitation-style movements, or adding resistance to brisk routines.

   Not ideal for: Buyers seeking a pair, heavier strength work, or a dumbbell they can keep using as their lifting capacity increases.

   • Brand:Marcy
   • Weight:5 lb
   • Quantity:1 dumbbell
   • Material:Neoprene
   • Handle diameter:1.25 inches
   • Dimensions:7 in L × 3.5 in W
   • Features:Non-slip grip, no-roll head, rust resistant
   • Model:INE-005
   Our verdict

   “Choose this single 5 lb weight for comfortable, light home workouts, but pick the Marcy 6 lb version if you want a small increase in resistance.”

   → See it on Amazon →

2. Amazon Basics 20-Pound Rubber Hex Dumbbell

   

   Best Fixed Weight for Heavier Home Lifting

   View Latest Price

   For buyers who already train with challenging loads, the Amazon Basics 20-Pound Rubber Hex Dumbbell offers a straightforward fixed-weight option. Its rubber-encased cast iron heads and hex shape help keep it from rolling, while the textured, contoured handle supports a steadier grip during repeated sets. Compared with the Marcy Hammertone Cast Iron Hex Dumbbell, this model adds rubber around the heads rather than using an all-cast-iron construction, which may be preferable where contact with the floor matters. The tradeoff is limited choice: this listing is one 20 lb dumbbell, not an adjustable weight or pair. It also sits well above the Marcy neoprene options in load, making it a poor first pick for light toning or beginners who need smaller increments.

   Pros:

   • Cast iron core provides a fixed strength-training load
   • Rubber-encased hex heads help limit rolling and soften contact with surfaces
   • Textured, contoured handle supports a secure grip
   • Suitable for home or gym strength workouts

   Cons:

   • Fixed at 20 lb, so it cannot adapt to different exercises or strength levels
   • Sold as one dumbbell rather than a pair
   • Heavier load is less suitable for light exercise and new lifters

   Best for: Home lifters who already use a 20 lb load and want a single rubber-encased hex dumbbell for strength exercises.

   Not ideal for: Beginners, buyers who need lighter weight increments, or anyone looking for an adjustable dumbbell or matched pair in one listing.

   • Brand:Amazon Basics
   • Weight:20 lb
   • Quantity:1 dumbbell
   • Construction:Solid cast iron with rubber encasing
   • Handle material:Rubber
   • Handle diameter:1.35 in
   • Dimensions:12.1 × 4.9 in
   • Head shape:Hexagonal
   Our verdict

   “Pick this if a fixed 20 lb load fits your training; for a broader range in one unit, the Amazon Basics Adjustable Dumbbell is more adaptable.”

   → See it on Amazon →

3. Marcy 6 lb Neoprene Dumbbell, Single

   

   Best for a Small Step Up from Light Weights

   View Latest Price

   The Marcy 6 lb Neoprene Dumbbell suits buyers who want a little more resistance than a very light hand weight without moving to a bulky metal dumbbell. Its textured neoprene handle is designed for a non-slip grip, and the no-roll head helps keep the weight from drifting during floor-based routines. Compared with the Marcy 5 lb Neoprene Dumbbell, this adds just one pound, so the change is useful for gradual progression but not a major jump in training load. The coating is rust resistant and comfortable for home use, though the fixed weight can become limiting as strength improves. As with the 5 lb model, it is sold individually; anyone building balanced two-hand workouts needs to source a second dumbbell separately.

   Pros:

   • Textured neoprene handle is designed for a non-slip hold
   • No-roll head helps keep the dumbbell in place between movements
   • Rust-resistant coating is practical for home storage
   • Small increase over the Marcy 5 lb model supports gradual progression

   Cons:

   • Sold individually rather than as a pair
   • Fixed 6 lb load may be too light for strength-focused training
   • Only a one-pound increase over the Marcy 5 lb option

   Best for: Home exercisers who find 5 lb too light and want a modest increase for controlled arm and upper-body exercises.

   Not ideal for: Buyers who need a pair straight away or want one dumbbell to support heavier, long-term strength progression.

   • Brand:Marcy
   • Weight:6 lb
   • Quantity:1 dumbbell
   • Materials:Cast iron and neoprene
   • Handle material:Neoprene
   • Handle diameter:1.25 inches
   • Dimensions:7.3 × 3.5 inches
   • Features:Non-slip grip, no-roll head, rust resistant
   Our verdict

   “Choose the 6 lb version if you want a small step beyond the Marcy 5 lb dumbbell, while recognizing that both are light, single weights.”

   → See it on Amazon →

4. Amazon Basics Adjustable Dumbbell, 25 lb

   

   Best Space-Saving Adjustable Pick

   View Latest Price

   The Amazon Basics Adjustable Dumbbell is the most versatile option here for buyers who want several training loads without storing multiple fixed dumbbells. Turning the handle selects five settings from 5 to 25 lb in 5 lb increments, so one unit can cover lighter movements and more demanding exercises. That flexibility distinguishes it from the Amazon Basics 20-Pound Rubber Hex Dumbbell, which offers a single load and a more conventional fixed design. The adjustable model includes a storage tray and an anti-drop design, but its maximum remains 25 lb; experienced lifters may outgrow that ceiling. This listing is also for one dumbbell, not a pair, and the selector mechanism makes it a more complex choice than a simple cast-iron hex weight.

   Pros:

   • Five selectable loads cover 5 to 25 lb in one dumbbell
   • Handle-turn adjustment makes changing settings straightforward
   • Anti-drop design helps keep weight plates secured
   • Included storage tray keeps the unit contained between workouts

   Cons:

   • Maximum load of 25 lb may not suit stronger or progressing lifters
   • Sold as one dumbbell, not a matched pair
   • Adjustment mechanism is more involved than a fixed hex dumbbell

   Best for: Home exercisers with limited storage who want one dumbbell for varied exercises and gradual 5 lb load changes.

   Not ideal for: Lifters needing loads above 25 lb, buyers who want a pair in one purchase, or those who prefer a simple fixed-weight dumbbell.

   • Brand:Amazon Basics
   • Weight settings:5, 10, 15, 20, and 25 lb
   • Quantity:1 dumbbell
   • Item weight:11.34 kg
   • Material:Alloy steel
   • Handle material:Nylon and fiberglass
   • Features:Adjustable weight, anti-drop design
   • Model:ADB-25LB
   Our verdict

   “Choose this adjustable model to save space and vary loads from 5 to 25 lb, but opt for fixed weights if you need a simpler design or heavier capacity.”

   → See it on Amazon →

5. Marcy Hammertone Cast Iron Hex Dumbbell, 3–100 lb, Single

   

   Best Weight Range for Long-Term Progression

   View Latest Price

   The Marcy Hammertone Cast Iron Hex Dumbbell stands out for its unusually broad selection of fixed weights, from 3 to 100 lb. That lets buyers choose a load suited to a particular exercise and move to a heavier option later, while the knurled cast-iron handle offers a textured grip without a neoprene covering. Its hexagonal heads help prevent rolling and make storage easier than a round dumbbell. Compared with the Amazon Basics 20-Pound Rubber Hex Dumbbell, Marcy offers far more weight choices, but the available range does not mean this listing includes multiple weights: each dumbbell is sold individually. The all-cast-iron build also lacks the rubber encasing on the Amazon Basics model, so it may be less forgiving on floors. Check the selected weight carefully, as the listed item weight is 5 lb.

   Pros:

   • Available in a broad range of fixed weights from 3 to 100 lb
   • Hexagonal heads help prevent rolling and support compact storage
   • Knurled handle provides a textured grip
   • Cast-iron construction suits a range of strength and stability exercises

   Cons:

   • Each dumbbell is sold individually, so matching a pair takes a separate purchase
   • Cast-iron heads are not rubber encased like the Amazon Basics 20 lb model
   • Listed item weight is 5 lb, so the selected weight option should be checked carefully

   Best for: Lifters who want to select a specific fixed weight now and keep the same hex-dumbbell style as they progress toward heavier loads.

   Not ideal for: Buyers wanting an adjustable all-in-one dumbbell, a pair, or rubber-encased heads for more floor-conscious home use.

   • Brand:Marcy
   • Material:Cast iron
   • Available weights:3, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 90, and 100 lb
   • Quantity:1 dumbbell, sold individually
   • Head shape:Hexagonal, no-roll
   • Handle:Knurled cast iron
   • Listed item weight:5 lb
   • Dimensions:8.63 in L × 2.5 in W
   Our verdict

   “Choose this Marcy if you want a fixed hex dumbbell with many weight options, but confirm the selected load and account for the single-dumbbell listing.”

   → See it on Amazon →

6. Amazon Basics 10-Pound Rubber Hex Dumbbell

   

   Best for Everyday Strength Training

   View Latest Price

   For a single dumbbell that can handle more than light toning, this 10-pound rubber hex model offers a practical balance of weight and straightforward design. Its cast-iron core gives it a solid fixed load, while the rubber coating helps limit noise and contact with floors. The hexagonal heads resist rolling, which is useful when setting the weight down between exercises or using it for supported movements. Compared with the Marcy Neoprene Dumbbell, 10 lb, Single, this Amazon Basics option has a rubber-encased build rather than a neoprene covering and a slightly wider listed handle diameter. The tradeoff is the same fixed-weight limitation: it cannot scale with your strength, and this listing includes only one dumbbell. It suits buyers who want a durable, basic 10-pound weight, not a matched pair out of the box.

   Pros:

   • Rubber-encased cast iron provides a solid fixed-weight build.
   • Hexagonal heads help keep the dumbbell from rolling when set down.
   • Textured, non-slip grip supports a secure hold.
   • 10-pound load suits a range of basic strength exercises.

   Cons:

   • Sold as one dumbbell, so paired exercises require a second purchase.
   • Fixed at 10 pounds and cannot adjust as training needs change.

   Best for: Home exercisers who want one durable 10-pound dumbbell for rows, presses, and other general strength work.

   Not ideal for: Beginners seeking a very light starter weight or buyers who need a matched pair in one purchase.

   • Weight:10 pounds
   • Quantity:1 dumbbell
   • Construction:Rubber-encased cast iron
   • Handle material:Rubber
   • Handle diameter:1.07 inches
   • Dimensions:10.7 × 4 inches
   • Shape:Hexagonal
   • Grip:Textured, non-slip
   Our verdict

   “Choose this single 10-pound dumbbell for straightforward home strength training if you do not need a pair or adjustable weight.”

   → See it on Amazon →

7. Marcy Neoprene Dumbbell, Single 2 lb

   

   Best for Very Light Training

   View Latest Price

   At 2 pounds, this Marcy is the lightest choice in this batch and makes more sense for gentle movement, rehabilitation-style routines, or adding light resistance to cardio than for progressive strength work. Its compact neoprene-covered cast-iron construction gives it a textured handle and a head designed not to roll away when placed on the floor. Compared with the Marcy Colored Neoprene Dumbbell Hand Weight (3 lb, Single), this model asks less of the user and may suit shorter or lower-intensity sessions; the 3-pound version offers a modest step up when that load feels too easy. Both are single dumbbells, so buyers planning symmetrical exercises need to account for a second unit. The main limitation is its narrow training range: it will not substitute for the heavier Amazon Basics 10-pound rubber hex dumbbell in demanding strength exercises.

   Pros:

   • Light 2-pound load suits gentle or low-intensity routines.
   • Textured neoprene handle is designed for a secure grip.
   • No-roll head helps keep it in place when set down.
   • Available in several weights for building a coordinated set over time.

   Cons:

   • Sold individually, so two-handed routines require another purchase.
   • Very light fixed load limits its usefulness for strength progression.

   Best for: People starting with very light resistance, returning to movement after a break, or adding a small load to low-impact exercise.

   Not ideal for: Lifters seeking meaningful resistance for rows, presses, or strength progression, since this model weighs only 2 pounds.

   • Weight:2 lb
   • Quantity:1 dumbbell
   • Materials:Cast iron, neoprene
   • Handle material:Neoprene
   • Handle diameter:1 inch
   • Dimensions:5.5 × 2.4 inches
   • Color:Azure
   • Features:Non-slip, no-roll head, rust resistant
   Our verdict

   “Pick this 2-pound Marcy for gentle, low-resistance workouts, but choose a heavier model if strength training is the main goal.”

   → See it on Amazon →

8. Marcy Neoprene Dumbbell, 10 lb, Single

   

   Best Neoprene Pick for a 10-Pound Load

   View Latest Price

   This 10-pound neoprene dumbbell combines a substantial fixed load with a coating that is comfortable to hold and less prone to rust than bare metal. Its no-roll head is handy for home workouts where weights are set down between sets, while the textured, non-slip grip supports a steady hold. Compared with the Amazon Basics 10-Pound Rubber Hex Dumbbell, the Marcy is the better fit for buyers who prefer a neoprene handle and a smaller listed handle diameter; the Amazon Basics uses rubber-encased heads and lists a slightly larger diameter. Neither offers adjustable resistance, and each listing contains just one weight. That makes the Marcy a reasonable choice for a single-weight routine, but less appealing if you want to buy a pair at once or need one dumbbell to cover multiple resistance levels.

   Pros:

   • Neoprene coating and textured handle provide a comfortable, non-slip hold.
   • No-roll head helps prevent it from wandering when placed on the floor.
   • Rust-resistant construction suits regular home use.
   • 10-pound weight provides more resistance than the lighter Marcy neoprene options.

   Cons:

   • Sold individually, so a pair requires purchasing two.
   • Fixed 10-pound load cannot be changed for different exercises or training stages.

   Best for: Home exercisers who want a single 10-pound dumbbell with a neoprene-coated handle for general arm and strength exercises.

   Not ideal for: Buyers who want a pair in one package or adjustable resistance for progression without adding more fixed dumbbells.

   • Weight:10 lb
   • Quantity:1 dumbbell
   • Materials:Cast iron, neoprene
   • Handle material:Neoprene
   • Handle diameter:1 inch
   • Dimensions:8.3 × 3.7 inches
   • Features:Non-slip grip, no-roll head, rust resistant
   • Model:INE-010
   Our verdict

   “Choose this Marcy if you want a single 10-pound neoprene dumbbell; pick an adjustable option if you need several loads in one setup.”

   → See it on Amazon →

9. Marcy Classic Rubber Hex Dumbbell (5 lb, Single)

   

   Best Compact Rubber Hex Pick

   View Latest Price

   The 5-pound Marcy rubber hex is a compact choice for buyers who want a small fixed weight with a more traditional strength-training feel than the light neoprene models. Its cast-iron core is wrapped in heavy-duty rubber, which can soften contact with floors and reduce clatter, while the knurled alloy-steel handle offers a different grip texture from the rubber and neoprene handles on the Amazon Basics and Marcy neoprene picks. Hexagonal heads also keep it from rolling between movements. Compared with the Amazon Basics 10-Pound Rubber Hex Dumbbell, this one is lighter and listed at 8.9 inches long, making it easier to place in a compact workout area, but it provides half the resistance. It is sold individually and fixed at 5 pounds, so it is a focused starter or accessory weight rather than a flexible all-purpose choice.

   Pros:

   • Rubber-coated cast iron helps protect floors and reduce noise.
   • Hexagonal heads resist rolling when set down.
   • Knurled alloy-steel handle provides a secure grip texture.
   • Compact listed dimensions suit smaller workout areas.

   Cons:

   • Sold individually, so paired exercises require purchasing a second dumbbell.
   • Fixed 5-pound weight offers limited scope as strength increases.

   Best for: Home exercisers who need a compact 5-pound weight for lighter strength work and prefer a knurled steel handle.

   Not ideal for: Buyers who need heavier resistance, an included pair, or multiple weight settings from one dumbbell.

   • Weight:5 lbs
   • Quantity:1 dumbbell
   • Material:Cast iron, rubber
   • Handle material:Alloy steel
   • Handle diameter:1.1 inches
   • Dimensions:8.9 × 3.1 inches
   • Color:Black/Chrome
   • Model number:IBRH-005
   Our verdict

   “Choose this Marcy for compact, lighter strength work with a knurled grip, but move to the Amazon Basics 10-pound hex for more resistance.”

   → See it on Amazon →

10. Marcy Colored Neoprene Dumbbell Hand Weight (3 lb, Single)

    

    Best Light Neoprene Step-Up

    View Latest Price

    Weighing 3 pounds, this Marcy sits between the 2-pound Marcy Neoprene Dumbbell and the heavier 5-pound Marcy Classic Rubber Hex. That makes it a useful middle step for light routines: it adds a little more resistance than the 2-pound option without moving into the firmer load of the rubber hex. The neoprene coating and non-slip handle are suited to comfortable home sessions, and its no-roll head helps keep the weight nearby when set down. The strawberry color also makes it easier to distinguish from darker weights in a mixed collection. Its tradeoffs are the same ones that matter across single dumbbells: it is fixed at 3 pounds and sold alone, so it is not a ready-made pair or a long-term substitute for heavier strength equipment.

    Pros:

    • 3-pound load offers a small step up from the 2-pound Marcy neoprene model.
    • Neoprene coating provides a comfortable, non-slip handle surface.
    • No-roll head helps keep the weight in place when set down.
    • Rust-resistant construction is suited to regular home use.

    Cons:

    • Sold as one dumbbell, so symmetrical exercises require another purchase.
    • Fixed light weight limits its usefulness for heavier strength work.

    Best for: Beginners and low-impact exercisers who want a light, comfortable 3-pound weight as a step up from 2 pounds.

    Not ideal for: People focused on progressive strength training or buyers who need a pair without purchasing a second dumbbell.

    • Weight:3 lbs
    • Quantity:1 dumbbell
    • Material:Cast iron core, neoprene coating
    • Handle material:Neoprene
    • Dimensions:6 × 2.6 inches
    • Color:Strawberry
    • Special features:Non-slip, no-roll head, rust resistant
    • Model number:INE-003
    Our verdict

    “Pick this 3-pound Marcy for light routines that need a modest step up from 2 pounds, not for heavier or adjustable training.”

    → See it on Amazon →

11. BowFlex Results Series SelectTech 552 Adjustable Dumbbell

    

    Best Adjustable Single Dumbbell

    View Latest Price

    The BowFlex Results Series SelectTech 552 is the most flexible pick here for buyers who want one dumbbell that can cover several training stages. Its dial changes the load from 5 to 52.5 pounds, so it can replace a collection of fixed weights such as the Amazon Basics 15-Pound Rubber Hex Dumbbell and 25-pound model. That range also makes it easier to vary resistance between exercises without storing a full rack.

    The tradeoff is its larger, more involved format: at a listed 55 pounds, it is less convenient to move than a single fixed dumbbell, and its shape may feel less familiar for some movements. The included tray gives the weight a designated storage spot, while the non-slip handle and locking system support controlled adjustments. JRNY training is included for two months, but ongoing access is not part of the long-term value.

    Pros:

    • Dial adjustment covers 5–52.5 pounds per dumbbell
    • Can replace multiple fixed weights and reduce storage needs
    • Non-slip ergonomic handle and locking system
    • Storage tray provides a dedicated place to keep it

    Cons:

    • Listed 55-pound item weight makes it less convenient to carry or reposition
    • Adjustable form may be less suited to buyers who prefer conventional fixed dumbbells
    • JRNY training is included for only two months

    Best for: Home exercisers who want one piece of equipment for progressive strength work and have room to store an adjustable dumbbell.

    Not ideal for: Buyers who want a simple, portable fixed weight or need a matched pair for exercises requiring two dumbbells.

    • Brand:Bowflex
    • Model:BFW0023-OS
    • Weight range:5–52.5 lbs per dumbbell
    • Item weight:55 lbs
    • Dimensions:16.9 × 8.3 in
    • Materials:ABS, alloy steel, plastic, polypropylene, rubber
    • Handle material:Alloy steel
    • Features:Adjustable weight, non-slip handle, locking system, storage tray
    Our verdict

    “Choose the SelectTech 552 if you want broad weight adjustment in one storage-conscious unit and can accept its bulkier format.”

    → See it on Amazon →

12. Amazon Basics 15-Pound Rubber Hex Dumbbell

    

    Best Midweight Fixed Dumbbell

    View Latest Price

    The Amazon Basics 15-Pound Rubber Hex Dumbbell suits buyers who already know they want a midweight load and would rather lift with a straightforward fixed dumbbell than adjust one between sets. Its cast iron core and rubber-encased hex heads combine a conventional feel with ends designed to resist rolling when set down. Compared with the BowFlex SelectTech 552, it offers less range and adjustability, but it is simpler to pick up and use without changing settings.

    The textured, contoured handle adds grip support for home or gym sessions, and the 15-pound size can work across several muscle groups. Its main limitation is the fixed load: unlike the SelectTech or a range of individually selected weights, it cannot grow with changing strength needs. This listing also contains one dumbbell, so buyers planning bilateral exercises may need another unit.

    Pros:

    • Solid cast iron core with rubber-encased heads
    • Hexagonal ends help limit rolling when stored
    • Textured, contoured handle supports a secure grip
    • 15-pound load can serve multiple muscle groups

    Cons:

    • Fixed at 15 pounds, with no way to adjust resistance
    • Sold as one dumbbell rather than a pair

    Best for: Home and gym lifters who want a conventional 15-pound dumbbell for moderate-load exercises and do not need adjustable resistance.

    Not ideal for: People who are still choosing their working weight, want a broad progression range from one item, or need a pair in one purchase.

    • Brand:Amazon Basics
    • Weight:15 pounds
    • Material:Cast iron with rubber coating
    • Handle material:Rubber
    • Handle diameter:1.34 inches
    • Dimensions:12 × 4.5 inches
    • Shape:Hexagonal heads
    • Pieces:1
    Our verdict

    “Pick this Amazon Basics model if 15 pounds is the load you need and you value simple fixed-weight use over adjustability.”

    → See it on Amazon →

13. Marcy Neoprene Dumbbell, Single 1 lb

    

    Best for Light-Toning Work

    View Latest Price

    The Marcy Neoprene Dumbbell, Single 1 lb is a niche choice for very light arm movements, mobility routines, or beginners who need minimal resistance. Its compact 5-by-2-inch size and slip-resistant neoprene handle make it easier to hold than heavier options such as the Amazon Basics 15-Pound Rubber Hex Dumbbell. The coating also gives the head a no-roll design and rust-resistant protection, making it a practical small weight to keep near a workout space.

    That light load is also the central limitation: it will not serve buyers looking for substantial resistance or a single dumbbell that can support a broad strength program. Marcy offers other listed weights from 2 to 20 pounds, but this item itself remains a single 1-pound dumbbell. Compared with the BowFlex SelectTech 552, it is far more compact and simple, but has no adjustment or meaningful load progression on its own.

    Pros:

    • Textured neoprene coating and slip-resistant handle
    • No-roll head is convenient to set down
    • Rust-resistant construction
    • Compact 5-by-2-inch dimensions suit light home routines

    Cons:

    • One-pound load is too light for many strength-training exercises
    • Sold as a single dumbbell, not a pair
    • Fixed weight offers no progression without buying other sizes

    Best for: Beginners, rehabilitation-focused exercisers, or people doing light arm and mobility routines who specifically need a 1-pound weight.

    Not ideal for: Strength trainees seeking moderate or heavy resistance, or buyers who want a pair or adjustable weight range from one purchase.

    • Brand:Marcy
    • Model:INE-001
    • Weight:1 lb
    • Unit count:1
    • Material:Cast iron with neoprene coating
    • Handle material:Neoprene
    • Dimensions:5 in L × 2 in W
    • Features:Non-slip, no-roll head, rust resistant
    • Available weights:1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 15, and 20 lb
    Our verdict

    “Choose this Marcy only if a compact 1-pound weight matches your light-toning or mobility routine.”

    → See it on Amazon →

14. Amazon Basics Rubber Hex Dumbbell, 25 lb

    

    Best for Heavier Fixed-Weight Training

    View Latest Price

    For lifters who already want a heavier fixed load, the Amazon Basics Rubber Hex Dumbbell, 25 lb is the more strength-focused counterpart to the brand’s 15-pound model. Its cast iron heads with rubber encasing and hexagonal ends offer a conventional dumbbell design that is less prone to rolling when set down. The textured, contoured handle supports a comfortable grip for home or gym strength work.

    Compared with the 15-pound Amazon Basics dumbbell, this model provides a clear step up in resistance, but that only helps if 25 pounds suits the exercises and the lifter. It is fixed at 25 pounds, unlike the BowFlex SelectTech 552, which can change load for different movements. This listing is also for one dumbbell, so anyone planning two-handed or matched-pair work must account for a second unit. Its listed dimensions are larger than the 15-pound model’s.

    Pros:

    • 25-pound load supports heavier fixed-weight exercises
    • Cast iron heads are encased in rubber
    • Hexagonal ends help prevent rolling
    • Textured, contoured handle is designed for a comfortable grip

    Cons:

    • Fixed at 25 pounds, so it cannot adapt to different exercises or strength levels
    • Sold as one piece rather than a pair
    • Larger listed dimensions than the 15-pound Amazon Basics model

    Best for: Experienced home or gym lifters who need a single 25-pound dumbbell for exercises suited to a heavier fixed load.

    Not ideal for: Beginners unsure of their working weight, people needing adjustable resistance, or buyers seeking a pair in one listing.

    • Brand:Amazon Basics
    • Weight:25 lb
    • Material:Cast iron with rubber-encased heads
    • Handle material:Rubber
    • Handle diameter:1.32 in
    • Dimensions:12.5 × 5.25 in
    • Number of pieces:1
    • Special features:Hexagonal no-roll heads
    Our verdict

    “Choose this model when 25 pounds is the fixed load you need; pick the 15-pound version or BowFlex SelectTech 552 if you need more flexibility.”

    → See it on Amazon →

How We Picked

I compared these 14 options as single-dumbbell purchases, not as complete weight sets. My ranking weighs load usefulness, grip and coating, stability between sets, storage demands, and how well each design fits a distinct type of home workout. I also considered whether a product offers a practical advantage over another item in this lineup, rather than treating a different listed weight as a different kind of solution.

The 20-pound Amazon Basics rubber hex leads because its fixed load and hex shape serve a broad range of basic strength work without adjustable mechanisms. The BowFlex ranks highly for people who need several weights in one footprint, while lighter Marcy neoprene models rank better for entry-level or low-load use than general strength training. The 10-, 15-, and 25-pound fixed options are separated by training load rather than assumed quality; heavier cast iron brings a wider weight range but may be less comfortable for buyers who prefer coated handles. I treat each listed dumbbell as one unit, and avoid making claims about long-term durability or feel that cannot be verified from the product details.

Factors to Consider When Choosing Best Single Dumbbells

Before choosing a listed weight, I would start with the movements you plan to do and the space you have. A single dumbbell can be a useful tool, but its value depends on whether the design fits your routine and whether one unit is enough for the exercises you want to perform.

Choose a Load for Your Exercises, Not Your Ambition

Pick a weight based on the movement you expect to do most often, since a load that works for rows may be too heavy for shoulder raises. If you are new to resistance training, lighter options such as the 1- to 6-pound Marcy neoprene models can support controlled, higher-repetition work, but they may stop challenging you quickly. The 10-, 15-, and 20-pound fixed dumbbells create a more useful progression for many basic upper-body exercises. Heavy strength goals may call for a 25-pound model or a higher-load cast-iron option. A common mistake is buying the heaviest weight you can lift once; usable form across repeated sets matters more. If you are unsure, prioritize a load that lets you complete the intended movement with control.

Decide Whether One Dumbbell Fits Your Training

A single dumbbell works naturally for one-arm rows, lunges, suitcase carries, and other unilateral movements. It can also support some two-handed exercises, depending on the handle and the movement. It is less convenient for exercises that call for a matching dumbbell in each hand, such as many presses and curls. Before buying, list the movements in your routine and mark which require a pair. A single unit can be a lower-commitment way to add load, but a second matching dumbbell may become necessary if your program changes. That future need can affect whether a fixed model or an adjustable design makes more sense.

Fixed Weight or Adjustable Range?

Fixed dumbbells are quick to pick up and put down, with no selector or adjustment step between exercises. That simplicity suits focused routines and buyers who know the load they need. An adjustable model such as the BowFlex SelectTech 552 can replace several fixed weights in a compact workout area, but it introduces a mechanism that needs correct setup and careful handling. It may be less convenient when two different loads are needed at once, since this roundup lists one unit. Compare the space saved against the slower changes and more involved design. If you use only one or two loads, a fixed dumbbell may be the simpler fit.

Match the Coating and Shape to Your Room

Rubber hex and cast-iron hex dumbbells have flat sides that help limit rolling when set down, a practical feature on a crowded floor. Neoprene-coated weights offer a softer outer surface and color coding that can make light dumbbells easy to identify. Coating does not remove the need to store weights carefully, and it should not be treated as a guarantee against floor marks or wear. Think about where the dumbbell will sit between sessions, especially if it will share space with furniture or other equipment. A compact storage spot may favor one fixed weight, while a growing collection needs a rack or dedicated floor area. Choose the shape and finish for your space as well as your hand.

Plan for Progression and Matching Weights

One weight can serve a focused purpose, but strength gains often call for a heavier load over time. The Amazon Basics 10-, 15-, and 20-pound options provide distinct fixed-weight steps, while Marcy’s neoprene listings cluster around lighter training. The Marcy cast-iron line’s broad listed range can be appealing if you want to select a particular heavy load, though buying one unit still does not create a matched pair. Check whether you expect to add the same model and weight later; differences in handle shape or coating can make mixed equipment feel less consistent. A sensible plan is to buy for current use while leaving room in your budget and storage plan for the next load. Do not assume that a single dumbbell purchase will cover every future exercise.

Frequently Asked Questions

Can I build a useful workout with just one dumbbell?

Yes, a single dumbbell can support one-arm rows, split squats, lunges, carries, and other unilateral movements. It is also possible to use one weight for some exercises held with both hands, depending on the design and movement. The main limitation is that you cannot perform many paired-dumbbell exercises with equal loads in both hands. If your program relies on presses or curls with two weights, plan for a matching second unit. For a compact routine built around one-sided work, a single dumbbell can be a practical starting point.

Should I buy a 20-pound fixed dumbbell or the BowFlex adjustable model?

Choose the 20-pound Amazon Basics rubber hex if that load suits your main exercises and you want a simple weight that is ready immediately. The BowFlex SelectTech 552 makes more sense if you need several loads but have limited room for multiple fixed dumbbells. Its adjustment system adds a step between weight changes and requires more care than a plain fixed weight. Since the listed item is one dumbbell, neither choice automatically gives you a matching pair. Base the decision on how often your routine changes loads and whether storage space is a bigger constraint than simplicity.

Are neoprene dumbbells suitable for strength training?

They can work for light resistance exercises, warm-ups, controlled accessory movements, and routines where lower loads are appropriate. The Marcy neoprene options in this roundup range from 1 to 10 pounds, so they are less suited to buyers who need substantial resistance for heavier rows or presses. Their coated exterior may be more comfortable to handle than bare metal for some light-work routines, while rubber hex or cast-iron models offer heavier load choices here. Think about whether you are buying for mobility and endurance work or for progressive strength training. If you expect to increase resistance quickly, a light neoprene weight may have a short useful window.

Do I need to buy two of the same dumbbell?

Not always: one dumbbell can be enough for unilateral training, carries, and exercises where you hold a single weight centrally. You will need a pair for many movements performed with a separate weight in each hand, and using mismatched loads can change the exercise rather than simply make it harder. If you plan to add a second unit later, check that the exact weight and design remain available as a matching option. A fixed weight is straightforward to pair, while an adjustable single unit may still leave you with only one weight at a time. Decide based on your exercise list, not just the number of items in the package.

What weight should a beginner choose from this roundup?

There is no single beginner weight because the right load changes by exercise and training history. The Marcy 1-, 2-, 3-, 5-, and 6-pound neoprene models suit light movements, while the 10-pound option offers a step up for exercises that can handle more resistance. A beginner focused on rows or lower-body work may need more load than one focused on shoulder movements. Choose a weight that allows controlled repetitions without forcing your form to change, and remember that one dumbbell limits paired exercises. If you are uncertain, start with the movements you intend to train and choose the load for the most demanding one it will serve.

Conclusion

For the broadest fixed-weight use, I would choose the Amazon Basics 20-Pound Rubber Hex Dumbbell as best overall; it balances a practical load with a stable, no-adjustment design. The Amazon Basics 10- or 15-Pound Rubber Hex is the best value direction for buyers whose workouts call for a lighter fixed load, while the BowFlex SelectTech 552 is the best premium-style choice for people who want several settings in one compact unit. Beginners and buyers focused on light routines should look at the Marcy neoprene range, selecting the weight that fits their exercises rather than defaulting to the lightest. For a specific need—heavier fixed training or a wider choice of iron loads—the Marcy Hammertone Cast Iron Hex is the specialist option. Choose a single dumbbell only if one-sided work suits your routine; if you need matched-hand exercises, budget for a pair.