5 Best Adjustable Dumbbells, According to Personal Trainers
Save space and build strength with these handy workout tools.
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I consider dumbbells to be the ultimate strength training tool: They're effective and versatile, but a big drawback is the sheer amount of space just a few sets of dumbbells take up. As you progress in your muscle-building workouts, having to keep purchasing heavier sets can not only take up more space but also prove to be very expensive. That's where adjustable dumbbells come in. Designed for small spaces and convenience, this efficient piece of equipment can be an exercise game-changer.
Adjustable dumbbells feature a special built-in mechanism to adjust the weight, so you can take advantage of a full set of weights in a single pair, explains personal trainer Amy Schlinger, NASM-CPT. She says that adjustable dumbbells are great for people who are tight on space, as well as households where more than one person is planning to use the dumbbells and needs different size weights.
Our fitness and engineering experts in the Good Housekeeping Institute have analyzed and tested dozens of dumbbells over the years. Many adjustable dumbbells may look similar, but they can vary greatly in terms of design, materials, weight distribution and more. Our top picks take into account quality choices with a solid build, wide weight range and ergonomic design.
Pros
- Incredibly easy adjustment mechanism
- Up to 80 pounds per dumbbell
- Best for traditional strength training and body building
Cons
- Expensive
These adjustable dumbbells range from 5 to 80 pounds, making them great for not just traditional strength training but also for most serious bodybuilders. What I personally love about these is the adjustment mechanism — it's probably my favorite of all the adjustable dumbbells we tried. It couldn't be easier to use and is incredibly efficient: Simply twist the steel-knurled handle and you'll transition easily to the next weight. I also like that the dumbbell changes in 5 pound increments, which is great for supporting gradual strength gains. The set replaces 32 dumbbells and comes in a cradle for storage, making it great for small spaces.
These are another favorite for Schlinger as well, who cites the easy adjustment capabilities and sleek design. "These are super easy to adjust and not clunky at all." But she cautions to not slam them down like you potentially would at a commercial gym, as this can damage the handle (and in general, adjustable dumbbells are something you should be careful handling). They come at a steep price point, but are a go-to for me since they mimic the feel of a traditional dumbbell and are incredibly easy to adjust.
| Materials | Steel, aluminum, plastic and iron cast |
| Weight range | 5–80 lbs |
| Weight increments | 5 lbs |
| Adjustment mechanism | Dial |
| Dimensions | 19"L x 7.5"W x 7.5"H |
Pros
- Replaces 30 different dumbbells
- Affordable price point
- Best for traditional strength training
Cons
- Not suited for very heavy lifting
NordicTrack has historically performed well in our tests for cardio equipment like treadmills and exercise bikes. Exercise physiologist Sydnee Mostek, MS, RDN, ACSM-EP is a fan of this adjustable dumbbell set that comes in at a fairly affordable price considering that it replaces 30 dumbbells. The weight range is 10 to 55 pounds per dumbbell which is appropriate for most people, but not for those engaging in very heavy lifts.
Although the adjustment mechanism is a bit more seamless on other brand's dumbbells (this one has a few touch-points to change the weight), this pick from NordicTrack still does the job in a short period of time. The materials are a mix of steel and plastic but the weight distribution is solid and mimics that of a traditional dumbbell. The flat-head design is also great for loading on your thighs as you prepare for a bench press and other seated lifts.
| Materials | Steel and plastic |
| Weight range | 10–55 lbs |
| Weight increments | 2.5 or 5 lbs |
| Adjustment mechanism | Tab |
| Dimensions | 11.4"L x 19.4"W x 19.4"H |
Pros
- Sold as a single or a pair
- Easy dial for simple weight changes
- Connects to JRNY app for motion tracking
- Best for traditional strength training
Cons
- Not suited for very heavy lifting
My first pair of adjustable dumbbells, Bowflex is a great choice for beginners. The popular pick boasts a durable design and uses a dial for easy transitioning between weights. Available as a single or pair, this adjustable dumbbell has a comfortable grip that I find holds up best with traditional strength training movements including bicep curls and deadlifts. It can be used for cross-training movements like snatches, cleans and jerks as well.
Schlinger is a fan of the Bowflex SelectTech's too, citing the wide range of 5 to 52.5 pounds per dumbbell to accommodate most workouts and gradual 2.5 pounds increments. But if you're engaging in very heavy lifts then this may not be the best pick for you. You will have to line them up in the base to change the weight, but that is a pretty standard adjustment mechanism for most adjustable dumbbells.
One tech-savvy feature is that you can now download the JRNY app to connect your dumbbells with motion tracking. The app will provide you with real-time voice-assistant coaching and even count your reps, plus let you know how much weight you need for the next movement. All of these features make them great for novices who are looking for guidance in their strength training workouts.
| Materials | Metal, rubber and plastic |
| Weight range | 5–52.5 lbs |
| Weight increment | 2.5 lbs |
| Adjustment mechanism | Dial |
| Dimensions | 16.9"L x 8.3"W x 8.3"H |
Pros
- Durable cast-iron material
- Large weight range
- Mimics a traditional dumbbell feel
- Best for traditional strength training and body building
Cons
- Adjustments in only 10-pound increments
- Expensive
Snode stands out from most adjustable dumbbells on the market due to its premium cast iron materials. Of all the models I tested, this feels the most like a traditional dumbbell. Even the plates and the cradle for the set are full cast iron, producing not only an incredibly durable adjustable dumbbell but one that mimics the traditional kind. The only downside to cast iron is that it isn't ideal for placing on the floor during exercises since it may damage flooring, so I'd recommend keeping them in the cradle when not in use. I especially appreciate the flat head that works well in all different types of workouts. And the dumbbells are easy to adjust with the ring as long as the plates are aligned properly.
The weight range is solid on this model too, ranging from 10 to 80 pounds. But one downside is that the dumbbells move in only 10 pound increments, which can be pretty substantial as you're trying to slowly move up in weight. Snode does make small magnetic weight plates to increase the weight in a smaller increment, but these are a separate add-on purchase.
| Materials | Cast iron, aluminum and plastic |
| Weight range | 10–80 lbs |
| Weight increment | 10 lbs |
| Adjustment mechanism | Dial |
| Dimensions | 18.11"L x 6.68"W x 6.68"H |
Pros
- Incredibly durable design
- Solid materials
- Best for traditional strength training (Pro version great for bodybuilding)
Cons
- Shape may take some getting used to
This tried-and-true pick is a staple for Schlinger, who says that she uses them constantly in workouts and that they hold up extremely well. The unusual rectangular design may not be something you're used to, but these adjustable dumbbells are built to last and very durable. I got my first PowerBlock pair from my father who had already put them through heavy use, and they still held up years later.
"While they’re rectangular, I don’t find them to be clunky or awkward at all. I truly think they work great," Schlinger adds. But the different feel and shape may take some getting used to during specific workouts. Instead of a quick change handle like others on the market, they have a magnetic pin which takes a moment to adjust but is easy enough to use.
"I like that the bulk of the weight is steel, versus plastic, for the sake of durability," Mostek adds. "You can also buy accessories like a straight bar or kettlebell handle, making them even more versatile." And while this model ranges from 5 to 50 pounds, PowerBlock also makes a Pro version that ranges all the way up to 100 pounds.
| Materials | Steel |
| Weight range | 5–50 lbs |
| Weight increments | 2.5 lbs |
| Adjustment mechanism | Pin |
| Dimensions | 18"L x 15"W x 10"H |
How we test adjustable dumbbells
The fitness experts in the Good Housekeeping Institute Wellness Lab evaluate exercise equipment year-round ranging from treadmills to kettlebells. In our evaluation of adjustable dumbbells, we look for quality materials, ergonomic grip, easy-to-use adjustment mechanisms and a wide weight range. We also review overall shape and weight distribution, as well as assess wear and tear over time. Our personal trainers put the dumbbells through a variety of different workouts and exercises to ensure that they keep up with many strength training techniques.
What to look for when selecting an adjustable dumbbell
Mostek says that it's important to consider where you will store your adjustable dumbbell and whether or not it will be very visible. "Some come with stands so they're not on the floor, some have just a handle in the middle and others require you to sort of put your hand inside the block to hold them." Ultimately, you'll determine what makes sense for your budget, body and gym space, she adds. A few other factors to consider include:
✔️ Weight range: This is likely the most important factor to consider when purchasing an adjustable dumbbell. Schlinger says that it's crucial to make sure that the model has a weight range that is heavy enough if you have someone else using them who lifts significantly more than you.
✔️ Adjustment mechanism: "When it comes to adjustable dumbbells, you also want to look at the weight changing and locking system," Schlinger advises. Look for adjustable dumbbells that are easy and quick to adjust with a user-friendly adjustment mechanism. Some have dials, others have pins or tabs, so you'll want to find something that works for your needs.
✔️ Materials: Adjustable dumbbells come in all different types of materials, ranging from cast iron to plastic. While steel or cast iron models are more durable, plastic or rubber-coated dumbbells may protect flooring and provide a more secure grip. "Durable materials versus more flimsy ones like plastic are less likely to break even after years of lifting," Schlinger says.
✔️ Size and shape: Consider the types of exercises you'll be performing, which will inform what shape of dumbbell is best for your needs. For instance, if you are doing a bench press, you may want an adjustable dumbbell with a flat head to rest on your thighs as you get into position. If you are performing movements with the dumbbells on the floor, then you may need a more rectangular or hexagonal shape for stability.
✔️ Grip: The thickness of the grip, as well as the material will impact comfort and control when using an adjustable dumbbell. Look for ergonomic designs and textured grip surfaces to prevent slipping.
What are the benefits of using adjustable dumbbells?
Not only are adjustable dumbbells convenient, but having a wide range of weights in one tool can prove useful in a variety of workouts. A few other benefits include:
✔️ Space-saving: You can't beat the convenience of adjustable dumbbells and their space-saving design. "You only need one set of dumbbells versus a whole rack of weights," Schlinger explains.
✔️ Versatility: "If you have multiple people in the house using them, they provide versatility for different strength and experience levels," Mostek adds.
✔️ Cost-effective: Although the initial upfront cost may seem expensive, Mostek says that adjustable dumbbells tend to be pretty cost-effective compared to buying single weights individually.
✔️ Growth: "Using adjustable dumbbells allows for increases in strength without needing to keep buying bigger weights," Mostek says. Schlinger adds that you never have to stunt progress because of a shortage of weights.
Are there any downsides of using adjustable dumbbells?
In general, adjustable dumbbells aren't as solid as regular dumbbells and can move or shift a bit during workouts, but their space-saving benefits make them appealing for many home gyms. Some other limitations include:
✔️ Size: "Adjustable dumbbells can be bulky and therefore a little clunky feeling for certain exercises. That’s usually the biggest concern with adjustable versus regular," Schlinger says. Plus, the design of some adjustable dumbbells can lead to an uneven weight distribution which may impact balance during certain exercises.
✔️ Shape: "Some pairs like the PowerBlocks that are rectangular can feel funky to people who are used to using a round shape, but they work the same," Schlinger explains.
✔️ Fragility: These dumbbells also tend to be fragile and should not be dropped as this can impact the adjustment mechanisms and functionality over time.
✔️ Weight limit: This is more of a concern for individuals who are lifting very heavy weights, but the maximum weight on certain adjustable dumbbell models can be limited compared to buying individual dumbbells for higher lifting needs.
Should you buy one adjustable dumbbell or a pair?
If it's within your budget, Schlinger advises purchasing a pair since you typically need two weights for most workouts. Ultimately, you have to assess your exercise needs and determine whether or not your workout programming requires two separate dumbbells. You can get a great workout with just one adjustable dumbbell, but if you're doing lateral work you may want to purchase two of them.
Why trust Good Housekeeping?
This article was written by Stefani Sassos, who has been working in the fitness industry for the past 10 years, specializing in indoor cycling and strength training. As a NASM-Certified Personal Trainer, Stefani uses her expertise and exercise science knowledge to create informed fitness content for the Good Housekeeping Institute. She regularly uses dumbbells of all sizes, including adjustable ones, and is an avid CrossFit athlete. She's seen firsthand just how much strength training has transformed her fitness and says that it's never too late to start a weightlifting routine.
Amy Schlinger, NASM, CPT, is a health and fitness writer and editor based in New York City whose work has appeared in Good Housekeeping, Men’s Health, Women’s Health, The New York Post, Self, Shape, Cosmopolitan, Glamour and more. As a NASM-Certified Personal Trainer, Amy is extremely passionate about healthy living and can often be found strength training at the gym when she isn’t interviewing trainers, doctors, medical professionals, nutritionists or pro athletes for stories.
Sydnee Mostek, MS, RDN, ACSM-EP, is a registered dietitian and ACSM exercise physiologist with master's degrees in both fields. She is dedicated to helping people achieve better health through movement and nutrition that fits their lifestyle.
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