The 6 Best Adjustable Dumbbells on Amazon in 2026

Why it made the list

• Its listing says each dumbbell changes from 5 to 50 lb with one hand: set it in the cradle, twist the handle, and the weight changes.
• It is compact. The listing gives 14.5 inches long, and Wirecutter notes the dumbbell shortens as the weight drops.
• The grip is described as contoured, textured and soft, and the listing names a two-year parts warranty.

Drawbacks

• Weight moves in 5 lb steps only, so there is no 2.5 lb jump for light work.
• Wirecutter says the cradle sometimes sticks to the dumbbell at 35 lb and always at 50 lb. A hand or a foot on the cradle frees it.

Skip it if you want 2.5 lb steps. The PowerBlock has micro weights.

Why it made the list

• A magnetic pin picks one of 16 weights from 5 to 50 lb per hand, with 2.5 lb micro weights for the small steps.
• Its listing gives 12 by 7 by 7 inches and says it replaces 16 pairs of traditional dumbbells.
• Expansion kits take it to 70 or 90 lb per hand as you get stronger, and the listing names a five-year residential warranty.

Drawbacks

• It is a block, not a round dumbbell. Wirecutter says some people are put off by the boxy shape of a PowerBlock, which past testers compared to reaching into a toaster.
• The expansion kits are sold separately.

Watch for this: The listing says the Elite EXP kits do not work with the Elite USA 90. Match the family before you buy a kit.

Skip it if you want to change weight by turning a handle. The Core Home Fitness set does that.

Why it made the list

• Its listing says each dumbbell moves in 2.5, 5 and 10 lb steps, picked with a weight selector, up to 55 lb.
• Each dumbbell has a 10 lb handlebar that can be used by itself.
• Custom-molded storage trays with clear weight markings come with it.

Drawbacks

• Wirecutter says the adjustment takes some getting used to and that the lever on its set occasionally stuck.
• The listing names steel and hardened plastic, and Wirecutter pays attention to how much of a set is plastic.

Skip it if you want one motion to change weight. The Core Home Fitness set needs only a twist.

Why it made the list

• A quick-adjust dial changes each dumbbell from 5 to 25 lb, and the listing says one set replaces several fixed dumbbells.
• The listing names alloy steel, a secure locking mechanism and a textured non-slip grip.

Drawbacks

• It stops at 25 lb per dumbbell.
• The dumbbell has to sit squarely in the cradle to change weight, and it can feel clunky in use.

Watch for this: Lifepro sells this line in several sizes under related listings. Check the weight on the page before you buy.

Skip it if you will lift more than 25 lb per dumbbell. The Core Home Fitness set and the PowerBlock reach 50.

Why it made the list

• You slide plates onto the handles and tighten threaded collars. Its listing counts two 3 lb handles, four 2.5 lb plates, four 5 lb plates and four collars, which makes 19 lb per dumbbell and 38 lb for the pair.
• It packs into a carry case with a handle.
• The bars have a long threaded section, so extra plates can be added later.

Drawbacks

• Changing weight means unscrewing collars and moving plates, the slowest way to change that Live Science and Wirecutter describe.
• The handle knurling is rough, so gloves help.
• The smallest plate is 2.5 lb on a 3 lb handle, so you cannot make an even 5 or 10 lb dumbbell.

Skip it if you change weight often during a workout. A dial or twist set is faster.

Why it made the list

• Its listing gives 16 plates in four weights, four of each, with threaded bars and spin-lock collars, up to 66 lb for the pair.
• The listing names polyethylene plates instead of metal ones.

Drawbacks

• Plastic plates and locks may wear faster than metal. That is our inference from the listing’s material line.
• The set may arrive with a strong smell that airs out over a few days, and the collars need tightening so plates do not loosen.
• The listing gives 19.7 inches in length, which can feel long on some moves.

Watch for this: Yaheetech sells this set in more than one weight under related listings. Check which one is on the page.

Skip it if you want a metal set or a quick change. The Amazon Basics plates are metal.