The Best Adjustable Dumbbells

A pair of adjustable dumbbells replaces a rack you don't have room for. Instead of ten or fifteen pairs of fixed weights eating a wall of your garage, you get two handles and a tray that tucks under a bench. That's the whole appeal, and it's a real one. But the thing you'll actually notice day to day isn't the space savings — it's how long it takes to go from 20 pounds to 35 between sets. A set that changes fast keeps you moving. A set that fights you turns every superset into a chore.

Here's the honest part: no adjustable dumbbell feels quite like a real dumbbell. They're all longer than a fixed weight of the same load, which makes lateral raises and unilateral balance work a little awkward at the light end. They all have more moving parts than a hunk of cast iron, so they all eventually jam, stick, or wear. And none of them can be dropped. Every set here needs to be lowered to its tray or the floor with control, every rep, forever. If you like slamming weights down after a hard set, buy fixed dumbbells.

We looked at eight sets across every mechanism and price tier, from a 24-pound beginner block to a 90-pound dial. We think that the BowFlex Results Series 552 SelectTech is the best adjustable dumbbell for most people, and that the ATIVAFIT Adjustable Dumbbell Set is the one to buy if you want a higher weight ceiling without paying premium-brand money.

Buy adjustable dumbbells if you'd otherwise need eight or more pairs of fixed weights and don't have a wall to put them on. One pair covers the full range of a normal strength program in the footprint of a laundry basket, and the savings against buying fixed dumbbells across the same range are substantial. They're a good fit for anyone training at home three or more days a week, in a spare room, a garage, or an apartment.

Skip them if you train with two or three specific heavy loads and nothing else, or if you need to drop the weight at the end of a set. Competitive powerlifters and anyone doing high-rep Olympic-style work should buy fixed dumbbells, which have zero mechanical play and don't care how they hit the ground. This guide covers complete adjustable dumbbell sets and one expansion kit for an existing system; it doesn't cover benches, racks, stands, or fixed dumbbells.

We built this guide around five things. Adjustment speed: dial systems change in seconds, pin systems in under ten, and bolt systems in closer to a minute — match the mechanism to how you rest between sets. Range and increments: most people never need more than about 50 pounds per hand, but finer steps matter more than a high ceiling if you're chasing steady progression. Handle and shape: traditional silhouettes work with every exercise, while block designs can catch your forearms and thighs. Locking reliability: a jammed or shifting mechanism is what kills these sets, so we leaned on long-run owner reports of exactly that. Support: we compared stated warranty terms and how buyers describe the claims process, which varies more between brands than the hardware does.

If you want the finest weight increments: The Nordictrack 55 lb Select-a-Weight Dumbbell Pair ($399) — The NordicTrack Select-a-Weight adjusts in 2.5, 5, and 10-pound steps, which is finer granularity than anything else here. That matters for lateral raises and rotator cuff work, where a 5-pound jump can be a 30 percent increase. The 10-pound handlebar also works on its own as a light dumbbell, effectively doubling what you can grab. It's compatible with iFIT for guided sessions. You give up ceiling — 55 pounds per hand is where it stops — and the adjustment is less intuitive than a Bowflex dial the first few times. Owners also report the small-plate locking pin as the part most likely to fail.

If you already own PowerBlock Elite EXP dumbbells: The POWERBLOCK Elite EXP 50-70 lb Dumbbell Kit ($199) — This Stage 2 kit takes an existing 5-to-50-pound Elite EXP set up to 70 pounds per hand without buying new handles or trays. It uses the same magnetic pin, rated to a 500-pound max load, and keeps the same footprint. Owners fitting it to Elite EXPs describe it as a drop-in with no fuss. It's not a standalone product — you need the Stage 1 set first, and it won't fit the older PowerBlock Classic. The block shape remains the compromise, and a few owners report a plate that occasionally sticks between settings.

These are the sets our research surfaced across the mechanism types and price tiers people actually shop, not a complete map of the category. New brands appear in this space constantly, and most of them are variations on the dial or pin designs already represented here.

The BowFlex Results Series 1090 SelectTech Single Dumbbell ($386.50) — The BowFlex Results Series 1090 is the same dial mechanism as our top pick, scaled up to 10–90 pounds in 5-pound steps — the widest dial-adjust range here, replacing 17 separate weights. The catch is that this listing is a single dumbbell, so budget for two if you want a pair, which lands it above the NUOBELL. It's also longer and heavier than the 552, which makes unilateral work more demanding. Owner sentiment is thinner and more divided than on the 552, with reports of jamming mechanisms and settings that don't match the labeled weight. Worth considering if you need 90 pounds with dial speed and want Bowflex's service network, but check the manufacturer's own pricing on a pair before you commit.

The PowerBlock Sport 24 Adjustable Dumbbells ($219) — The PowerBlock Sport 24 covers 3 to 24 pounds per hand in 3-pound steps, in the smallest footprint of anything here — owners run these in RVs and studio apartments. The magnetic pin is the same 500-pound-rated design as the Elite EXP, backed by a five-year residential warranty, which makes it the most durable set at the entry level. It lost to our picks on one thing: the ceiling. Twenty-four pounds covers a beginner program and light accessory work, but you'll pass it on rows and RDLs within a year, and the Sport line doesn't expand. Choose it if you're certain you want light weights in a tiny space, or if you're buying for someone starting out; otherwise start with something that grows.

The single rule that governs every set here: never drop them. Adjustable dumbbells have plates held by pins, dials, or bolts, and a hard landing is what cracks housings and bends locking hardware. Lower them to the tray with control at the end of every set, even the last one. Before you adjust, always seat the dumbbell fully in its cradle — changing weight mid-air is how mechanisms jam. Give the dial or pin a wipe every few weeks; chalk dust and grit are what turn a smooth adjustment into a sticky one. If a setting starts feeling notchy, stop and clear it rather than forcing the mechanism past it. And measure your tray space before ordering. Most sets need a bit more floor width than the dumbbells themselves suggest.

For this guide:

• We compared manufacturer specifications and listing details for all eight sets, focusing on weight range, increment size, adjustment mechanism, and stated warranty terms.
• We read published reviews of the major adjustable dumbbell systems alongside owner feedback for each listing, paying particular attention to recurring reports of jammed mechanisms, shifting plates, and how warranty claims were handled.
• We read owner reviews on every listing, weighted toward the critical ones, because that is where the recurring failures show up.
• We have a systematic way of automatically fetching the latest prices, so the numbers on this page stay current.
• This is a research-focused guide, so the team may not own every product listed — though we often do own the top winners, which gives us extra context for the recommendations.
• We don't accept free products, and the retailer commission never changes which product we recommend.