TOP 10 Best Adjustable Dumbbells

An adjustable pair only earns its floor space if changing the weight stays quick enough that you do it every set. Pick a mechanism you dislike and the pair may sit unused.

This guide is built from manufacturer pages and published reviews. We have not tested these products ourselves. Links go to Amazon search results and carry our affiliate tag; we earn a small commission if you buy, at no extra cost to you. One note on the old list. The Bowflex Home Gym Series on that list is a full home gym machine rather than a dumbbell, so we dropped it from this guide.

How to Choose Adjustable Dumbbells

Start with the top weight you actually need. If your hardest set is a row or a floor press, a lighter pair can last years. If you plan to press overhead or squat, buy headroom now. Upgrading later costs more than buying once.

Look at the smallest weight change. Small steps let you add a little at a time on overhead lifts, where progress comes slowly. Large steps force jumps that stall you.

Check the handle material and diameter in the listing. The pairs below range from knurled steel to rubber and plastic-covered nylon, and what feels right is personal.

Measure your space before you buy. Some models sit in trays and take up a corner of the room. Others are compact blocks you can slide under a bench. If you train in a small apartment, check the listed dimensions before you buy.

Decide how you adjust the weight. Selector pins and dials set the weight on the dumbbell itself. Spin-lock collars are threaded and tightened by hand on both dumbbells. Warranty terms vary by brand, so read them for the exact model you buy.

Quick Comparison

PowerBlock Elite EXP

The Elite EXP is a block. It does not look like a dumbbell and it does not move like one at first. One published review mentions a learning curve with the unconventional design.

Stage one runs from five to fifty pounds per hand in small steps, with a magnetic pin holding the plates. Expansion kits sold separately take it higher later. The steel is powder coated and the frame is compact. Warranty runs five years for home use.

Pros. Magnetic selector pin. Small steps between settings. Expansion path to heavier loads. Stage one measures 12 by 6 by 6 inches.

Cons. Block shape has a learning curve. Expansion kits are sold separately.

Best for. Lifters who want one pair to grow with them for years.

Check PowerBlock Elite EXP on Amazon

ATIVAFIT Adjustable Dumbbell

Our original listing did not say which weight model it covered. The brand sells dial models at 25, 50, 66 and 88 lb per dumbbell, so check the title before you order. The 25, 50 and 66 lb models move in five pound steps.

A reviewer on the heavier class noted a non-knurled rubber grip, adjustment from either end, a safety lock and a plastic stand. The brand's own page lists steel plates and a reinforced base. The reviewer also notes that the 66 lb class starts at 11 lb, so check the lowest setting against your lightest sets.

Pros. Four model classes listed by the brand. Steel plates. Two-year warranty. Changes from either end.

Cons. Model names are easy to confuse. Five pound steps are coarse for small jumps. Stand is plastic.

Best for. Home lifters who want a dial pair at a range that fits their training.

Check ATIVAFIT Adjustable Dumbbell on Amazon

Merax Deluxe 71.5 lb Adjustable Dial Dumbbell

Merax goes heavy. The top setting reaches 71.5 lb per dumbbell, and the plates are steel with an anti-corrosive finish. A single dial with a red button sets the weight across a dozen positions. Trays come in the box.

A reviewer praised the steel plates over plastic-coated ones, then warned about the handle and the mechanism. The handle feels long at first, and the adjustment mechanism has plastic parts that can break if the dumbbell is dropped.

Pros. High top weight. Steel plates. Trays included. Rubber convex grip.

Cons. Long handle takes getting used to. Plastic parts in the dial. Needs careful handling.

Best for. Strong lifters who want heavy sets without a rack of fixed pairs.

Check Merax Deluxe 71.5 lb Adjustable Dial Dumbbell on Amazon

FLYBIRD Adjustable Dumbbell 25 lb

FLYBIRD makes a light dial pair. Each one runs from five to twenty-five pounds in five pound steps and takes the place of up to five fixed pairs. A rotating dial does the change. It includes a storage tray.

The handle is plastic-covered nylon with small ridges and no knurling, about an inch across. Plates are hexagonal and coated. One reviewer considers the plastic construction less durable than cast iron and the range too small for experienced lifters, which is worth weighing before you order.

Pros. Low entry weight. Replaces up to five fixed pairs. Storage tray. One-year warranty.

Cons. Plastic build. Coarse steps. Too light for experienced lifters.

Best for. Beginners who want a light pair.

Check FLYBIRD Adjustable Dumbbell 25 lb on Amazon

papababe Adjustable Dumbbells Cast Iron with Connector

This is the old-school route. Cast iron plates with a powder coat, a diamond knurled grip and threaded collars you spin by hand. A chromed steel connector joins the two dumbbells into one bar. The connector fits one-inch spin-lock dumbbells.

The brand sells sets from forty to two hundred pounds. You get cast iron plates and a barbell option, and in return you accept slow changes and threading every collar yourself between sets.

Pros. Cast iron plates. Diamond knurled grip. Connector turns the pair into a barbell. Wide range of set sizes.

Cons. Slow to change. Collars need hand tightening.

Best for. Lifters who want iron plates and a barbell option.

Check papababe Adjustable Dumbbells Cast Iron with Connector on Amazon

CDCASA Adjustable Dumbbells 44 or 66 lb 2-in-1

CDCASA sells two-in-one sets that work as dumbbells or as one barbell. Spin-lock collars hold the plates. The bar is steel with a rubber coating and the grips have TPU covers. A connecting rod joins the pair.

The 44 lb set ships with a dozen plates in three sizes. A reviewer called assembly easy and liked that the set saves space and needs no extra plates later, which fits a starter kit.

Pros. Two setups in one. Easy assembly. Space saving. Reviewer found no extra plates needed.

Cons. Modest top weight. Spin-lock changes are slow.

Best for. Beginners who want dumbbells and a light barbell from one box.

Check CDCASA Adjustable Dumbbells 44 or 66 lb 2-in-1 on Amazon

BESPORTBLE Dumbbells Set 66LB

BESPORTBLE packs a full set into one box. Eight larger plates, four mid plates and four small ones, plus three connecting rods and four screw nuts. You can run it as a pair of dumbbells or as a single barbell. The set is listed as cast iron with a silicone cover.

The catch is stock. The search results we reviewed showed most Amazon listings as unavailable, and stock may change, so check before you plan a program around it. The listed set includes three plate sizes.

Pros. Three plate sizes. Barbell option. Cast iron with silicone cover.

Cons. Often out of stock. Spin-lock collars are slow.

Best for. Buyers who want an iron set and can wait for stock.

Check BESPORTBLE Dumbbells Set 66LB on Amazon

Nice C Adjustable Dumbbell Weight Pair, 5-in-1

Nice C takes a different approach. The dumbbells are neoprene coated and weigh a little over two pounds empty. Add-on bars raise each one to a bit over eleven pounds. The handle is curved and the neoprene resists slipping.

This is a light tool with a low top weight, so check that top weight against your lifts. Treat it as a pair for light work and warm-ups.

Pros. Very light starting weight. Neoprene coating. Curved slip-resistant handle. Sold as a five-in-one pair.

Cons. Low top weight. Not built for heavy lifting.

Best for. Light work and warm-ups.

Check Nice C Adjustable Dumbbell Weight Pair, 5-in-1 on Amazon

papababe Dumbbell Set with A-Frame Rack

This papababe set is not adjustable. It is five fixed pairs, from five to twenty-five pounds, on a rack. The heads are rubber-encased hex shapes over cast iron cores, and the handles are knurled steel. The rack comes with the set.

If you want fixed weights and a place to store them, this solves both at once, though one retailer notes the rubber coating may have a mild smell at first.

Pros. Five pairs in one purchase. Rack included. Knurled steel handles. Rubber-encased heads.

Cons. Not adjustable. Fixed jumps between pairs. Rubber smell at first.

Best for. Lifters who want fixed pairs and tidy storage.

Check papababe Dumbbell Set with A-Frame Rack on Amazon

Options by Situation

If you want one pair with a documented expansion path, consider the PowerBlock Elite EXP. If you want a dial pair, match the ATIVAFIT model to your top lift, and go heavier if you press overhead. If you want cast iron and a barbell option, the papababe connector set is the one to look at.

Frequently Asked Questions

Is a dial faster than spin-lock collars?

Often. On the models covered here, a dial or a selector pin sets the weight on the dumbbell itself, while spin-lock collars mean threading and tightening by hand on both dumbbells. Exact times vary by product.

Can I buy a single dumbbell to match one I already own?

Sometimes. Read the listing title and product options before you order, since a mismatch leaves you with an odd pair.

How do I protect my floor?

Use the tray or stand if your model includes one, and set the weights down under control. The Merax reviewer warns that its plastic parts can break if dropped, so careful handling is wise with any adjustable set.

Does the lowest weight matter?

Yes, if you plan light sets. The pairs here start from very different weights, so check the lowest setting in the listing against your lightest exercises.