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The epitome of an all-in-one piece of gym equipment.

Any avid gym-goer will tell you that leveling up (or down) in weights is a major part of getting toned. But not all of us have room for an expansive workout space filled with every type of home gym equipment imaginable. Luckily, the best adjustable dumbbells can replace a whole set of weights with just one compact pair.

While adjustable dumbbells are often expensive, experts say they’re well worth the price tag. “Adjustable dumbbells are often a bit of an investment, but they really give you a lot of bang for your buck,” says Lauren Del Turco, C.P.T. “Whether you don’t have the room for—or just don’t feel like collecting—a whole slew of weights, an adjustable set is a really space-efficient way to have access to basically an entire rack of dumbbells in one.”

✔️ A good grip. Being able to comfortably hold your weights is essential for good form and overall safety, so look at the dumbbells or kettlebells that you currently use and love, and look for an adjustable version that replicates that.

✔️ The weight increments they offer. “Look to see what the weight range is for the adjustable dumbbells (ie: 5- 25-bs) as well as the increments they go up in (ie: going up in 3-lb increments). This is important so you make sure the dumbbells you are using work with your current fitness level, as well as give you room to challenge yourself and appropriately progress up gradually,” says Marisa Golan, NASM C.P.T. and owner of E(M)powered.

✔️ The type of exercises you’ll use them for. “Certain adjustable dumbbells are very bulky and may make it awkward and uncomfortable to perform certain exercises correctly that require more movement or placing body weight support on the dumbbell,” explains Golan.

We know, these are pricey—but you're getting multiple sets worth of weights in one.  These adjustable dumbbells come with 15 weight increments per dumbbell. Plus, this space-saving adjustable dumbbell set delivers the same value as 30 individual dumbbells in a fraction of the space.

“I have the NordicTrack Select-A-Weight 55-lb Dumbbell Set and love them," says Del Turco. "Each can be adjusted to anything from 10 to 55 pounds, offering enough options that both my husband and I can really get in a great workout using them. I find them to be quick and easy to adjust—and I also like that I can take out the two 2.5-pound weight inserts in each dumbbell to use when I want to work with super lightweight, like during my warm-up and muscle activations.”

RELATED: 15 Best Dumbbell Exercises to Strengthen Every Part of Your Body

Golan loves these adjustable dumbbells because they have a wide range of weight options (5 lbs-52 lbs), making it a great option for a variety of fitness levels, she says. “The wide range of weight options allow you to use these dumbbells with heavier exercises like lunges, goblet squats, and deadlifts as well as lighter exercises like shoulder raises, curls, etc.” Plus, these dumbbells come in 2.5 lb increments up to the first 25 lbs.

Golan recommends this set for its versatility. She says it's an “extremely versatile set that can be  transformed into dumbbells, [a] push-up stand, barbell, and Kettlebell.” Also important: a nonslip comfortable handle design that makes for a safer workout. This set comes in a 5.5- 44-lb range.

For those new to weight training, or simply wanting lighter weights, Golan says this is the set for you. “[It's a] great option for beginners with the lower weight range of 2.5-12.5 lbs.” She also says the dumbbells have a nice textured rubber grip to prevent slipping. 

Though not as extensive as the other options on this list, these adjustable dumbbell barbells are perfect for those looking to get a two-for-one with their weights. These feature a non-slip neoprene hand. They come in an 11-lb or 22-lb set. With over 2,000 Amazon ratings, these are an affordable choice.

With rave reviews on the brand's site, these weights are a great space-saving option. They let you change weights in 5-lb increments with the simple twist of a handle—no knobs to turn or levers to slide. With adjustable weights ranging from 5 to 50 lbs, you can enjoy an entire 10-piece set in a single dumbbell.

The 66-lb weight plates and the simple way to switch between dumbbell, barbell, and abs wheel make this three-in-one a great option for anyone looking to add to their home gym. 

“These look so sleek, and they are of great value. It's easy to change out and add on the weights once you get used to the process. Most importantly, the feel is quite good. The grip part is a bit small for my hands but it's doable. I like that it only takes up a small amount of space in the corner, but I have all the weight parts I want. [My] only concern is that if you are only using a few of the weights, the bar seems silly to be that long since the weights won't take up all that space. Nice add to my growing gym collection,” wrote one satisfied customer.

This easy-to-use, basic adjustable dumbbell set is great for small spaces. Super affordable, these 38-lb weights include two 3-lb barbells, four 2.5-lb plates, four 5-lb plates, and four 0.5-lb collars. This pick boasts over 4,000 five-star reviews, too. 

“The dumbbells come in a neat box for storage....Instead of buying different weight dumbbells, this is a great option,” says one satisfied customer. “Only issue is it takes a few minutes to change and screw on different weights.”

This adjustable set includes six weight sizes in each dumbbell, so you get the equivalent of 12 dumbbells in one! Easy to store and move around, this lightweight set is great for beginners—and boasts a 4.7 star Amazon rating. 

“I was skeptical because the price range from other similar items was so far apart, but when it came in I was surprised, great build quality and it was as described!!” said one satisfied customer. “I love it, the quality is so good and it was an affordable one looking forward to a heavier set but this is great overall 10/10.”

These adjustable weights are no joke—just like their price tag. Though they do replace 17 sets of dumbbells—and customers say they are incredibly easy to use. With over 1300 positive reviews on the brand's website, they just might be worth the investment. 

“I love using these dumbbells they are simple and everything I need for my weight lifting goals. My husband lifts way heavier than I do so it's nice to be able to just dial in what we want and pick it up, without having tons of floor space used up to hold a whole weight rack,” wrote one satisfied customer.