Building a capable home gym does not require a full rack of fixed weights. The best adjustable dumbbells under $100 let you change resistance for presses, rows, curls, squats, and other exercises while using far less storage space.
This roundup compares compact sets with different weight ranges, adjustment systems, accessories, and training formats so you can choose a practical match for your goals and available room.
Best 10 Adjustable Dumbbells Under 100 Picks for 2026
Best Portable Set
Amazon Basics 38-Pound Adjustable Dumbbells
- Two dumbbells with 38 pounds total weight
- Manual plate-and-collar adjustment
- Includes portable storage case
Best For: Beginners and portable home workouts
Best Quick-Adjust Pair
Lifepro 25-Pound Adjustable Dumbbells
- Pair adjusts from 5 to 25 pounds
- Dial changes weight in 2.5-pound increments
- Compact design for full-body workouts
Best For: Space-conscious home gyms
Best Multifunctional Set
UNNMIIY 5-in-1 Adjustable Dumbbells
- Converts for five workout configurations
- 2-to-22.5-pound single-dumbbell range
- Includes connector and locking nuts
Best For: Versatile home strength training
Best Micro-Increment Control
- 11 settings from 3 to 28 pounds
- Dual-lock mechanism secures plates
- Includes a dedicated storage tray
Best For: Gradual progression with one compact dumbbell
Most Versatile
FEIERDUN DS2 5-in-1 Adjustable Dumbbells
- Converts to five types of fitness equipment
- Adjustable configurations for varied routines
- Foam-padded barbell connector included
Best For: Full-body home gyms needing versatile equipment
Fastest Adjustments
WLR 25-Lb Pair Adjustable Dumbbells
- 10 settings from 3 to 25 pounds each
- One-hand rapid-dial adjustment
- Safety interlock helps confirm settings
Best For: Quick transitions and incremental strength progression
Most Secure Locking System
FITPLAM 5-in-1 Adjustable Weight Set
- Dual-lock nuts help secure weight plates
- Converts for five types of training
- Stores in less than two square feet
Best For: Compact gyms prioritizing versatility and plate security
Most Versatile Bundle
4-in-1 Dumbbells with Foldable Bench
- Converts for four exercise setups
- Bench has 10 adjustable angles
- 800-pound bench capacity
Best For: Compact full-body home gyms
Best Compact Pair
- Five settings from 4 to 25 pounds
- Adjusts in about one second
- Dual-lock safety system
Best For: Beginners and moderate home workouts
Highest Weight Capacity
50-Lb Quick-Lock Adjustable Pair
- Adjusts from 10 to 50 pounds each
- 100 pounds combined capacity
- Includes storage bases
Best For: Progressive home strength training
Best Portable Set – Amazon Basics 38-Pound Adjustable Dumbbells
If you want adjustable dumbbells under 100 for straightforward strength training, this Amazon Basics set offers a traditional plate-and-collar design. It includes two dumbbells with 38 pounds of total weight, plus a storage case for transport and compact storage.
Best For: Beginners and home exercisers who prefer manually adjustable weights with a portable case.
Pros:
- Includes two dumbbells with 38 pounds total weight.
- Supports exercises for the arms, shoulders, back, and full body.
- Threaded collars secure the removable plates.
- Storage case includes a carry handle.
Cons:
- Weight changes require sliding plates on and off manually.
- Traditional plates and collars may take longer to adjust than dial-based designs.
This is a practical choice when portability and a familiar weight-plate setup matter more than rapid adjustments. The included case also makes it easier to keep the set organized between workouts.
Best Quick-Adjust Pair – Lifepro 25-Pound Adjustable Dumbbells
For shoppers comparing adjustable dumbbells under 100, the Lifepro pair is designed to replace several fixed-weight dumbbells in a compact home gym. Its quick-adjust dial changes resistance from 5 to 25 pounds in 2.5-pound increments.
Best For: Home users who want fast weight changes for full-body workouts and limited storage space.
Pros:
- Pair format provides two adjustable dumbbells.
- Quick-adjust dial offers 2.5-pound increments from 5 to 25 pounds.
- Suitable for curls, presses, rows, lunges, and other full-body movements.
- Textured grip and locking mechanism support controlled training.
Cons:
- Maximum listed weight is 25 pounds per dumbbell.
- The product notes indicate that included storage-rack availability depends on the selected option.
The Lifepro stands out for convenience: the dial-based system minimizes interruptions when moving between exercises. It is a strong fit for compact spaces and moderate-load strength routines.
Best Multifunctional Set – UNNMIIY 5-in-1 Adjustable Dumbbells
This UNNMIIY set is a flexible option among adjustable dumbbells under 100, combining dumbbell plates with hardware for barbell, kettlebell, and push-up-stand configurations. The pair supports adjustable single-dumbbell weights from 2 to 22.5 pounds.
Best For: Home users who want multiple exercise configurations from one adjustable set.
Pros:
- Five-in-one design can function as dumbbells, a barbell, kettlebells, and push-up stands.
- Adjustable single-dumbbell range is listed as 2 to 22.5 pounds.
- Thick foam connector is designed for more comfortable barbell-style use.
- Locking nuts help keep plates secured during training.
Cons:
- Changing configurations requires assembly rather than a quick dial adjustment.
- The multifunctional design may be less streamlined than dedicated adjustable dumbbells.
This set makes the most sense if versatility is a priority. Its connector and additional components broaden the range of exercises, while the detachable plates let users vary training intensity.
Best Micro-Increment Control – 28-Pound Adjustable Dumbbell
If precise progression is important when shopping for adjustable dumbbells under 100, this 28-pound model offers 11 listed weight settings from 3 to 28 pounds. Its dial selector and storage tray are designed to simplify changes and keep the workout area organized.
Best For: Individuals who want gradual weight progression and a compact, single-dumbbell setup.
Pros:
- Offers 11 weight settings from 3 to 28 pounds.
- Dual-lock system is designed to secure plates when lifted from the tray.
- Textured ergonomic handle supports a secure grip.
- Includes a dedicated storage tray.
Cons:
- This listing is for one dumbbell, not a pair.
- A 28-pound maximum may not meet the needs of heavier strength training.
The closely spaced weight settings make this a useful option for controlled progression and varied movements. Remember to account for the single-dumbbell format when comparing it with paired sets.
Most Versatile – FEIERDUN DS2 5-in-1 Adjustable Dumbbells
If you want adjustable dumbbells under 100 that can cover more than standard lifts, the FEIERDUN DS2 is a flexible home-gym option. The set converts into dumbbells, a barbell, kettlebells, weight plates, and push-up stands, with adjustable configurations for different training stages.
Best For: Home users who want one compact set for full-body workouts and multiple exercise formats.
Pros:
- Five functions replace several separate pieces of equipment.
- Adjustable ranges support beginner through advanced routines.
- Threaded locking knobs help keep weights secured during movement.
- Thickened foam on the connector adds comfort for barbell exercises.
Cons:
- Changing configurations requires manual assembly.
- The listed set weight and individual configurations may not suit users seeking heavier dumbbells.
The DS2 stands out for versatility rather than fast adjustments. Its solid iron-sand construction, broad exercise compatibility, and included connector make it a practical choice when space and budget are limited.
Fastest Adjustments – WLR 25-Lb Pair Adjustable Dumbbells
For shoppers comparing adjustable dumbbells under 100, this WLR pair focuses on quick, fine-grained weight changes. Each dumbbell offers 10 settings from 3 to 25 pounds, and the one-hand dial adjustment is designed to keep transitions brief during home workouts.
Best For: Users who prioritize quick weight changes and smaller increments for progressive training.
Pros:
- Each dumbbell provides 10 settings from 3 to 25 pounds.
- Micro-increments begin at 3 pounds instead of larger jumps.
- One-hand adjustment switches settings in about one second, according to the product notes.
- Base-tray interlock is designed to prevent lifting when the handle is between settings.
Cons:
- The 25-pound-per-dumbbell maximum may be limiting for advanced strength training.
- Unlike the multifunction sets, it is presented as a dumbbell pair rather than a multi-tool gym system.
This set is a strong fit for circuit training, shared household use, and gradual progression. Its main advantage is convenience: the dial system reduces plate swapping and offers more manageable weight steps.
Most Secure Locking System – FITPLAM 5-in-1 Adjustable Weight Set
This FITPLAM set is worth considering among adjustable dumbbells under 100 if secure plate fastening and equipment versatility are priorities. It converts into dumbbells, kettlebells, a barbell, weight plates, and push-up stands, while its dual-lock nuts add a second locking layer.
Best For: Compact home gyms that want multiple training formats and an extra-secure manual locking system.
Pros:
- Five-in-one design supports dumbbell, kettlebell, barbell, plate, and push-up exercises.
- Dual-lock red-and-black nuts are designed to reduce loosening and shifting.
- Multiple weight combinations accommodate different training intensities.
- The complete set stores in less than two square feet, according to the product notes.
Cons:
- Manual configuration changes are less immediate than dial-adjustable dumbbells.
- The multi-piece design requires assembly before switching exercise formats.
The FITPLAM is a practical space-saving choice for users who want a broad exercise range without buying separate equipment. Its dual-lock system and padded connector are useful additions for barbell-focused workouts.
Most Versatile Bundle – 4-in-1 Dumbbells with Foldable Bench
For shoppers comparing adjustable dumbbells under 100, the Rendpas set stands out by combining 45-pound adjustable weights with a foldable bench. It can convert for dumbbell, barbell, kettlebell, and push-up-stand exercises while the bench supports 10 backrest positions.
Best For: Apartment or bedroom users who want one compact bundle for varied full-body workouts.
Pros:
- Combines dumbbells, barbell, kettlebell, push-up stands, and bench in one set.
- Bench offers 10 angles from decline to upright and supports up to 800 pounds.
- Square plates resist rolling, while the foldable bench saves floor space.
- Bench arrives 90% pre-assembled and folds flat for storage.
Cons:
- The complete bundle weighs 68 pounds, so it is less portable than dumbbells alone.
- The 45-pound set may be limiting for advanced lifters seeking heavier dumbbell loads.
This is the broadest all-in-one option in the group. Choose it when exercise variety and a built-in bench matter more than having the simplest, lightest adjustable dumbbell set.
Best Compact Pair – 25-Lb Quick-Adjust Dumbbells
This pair is a practical pick among adjustable dumbbells under 100 for beginners and moderate home workouts. Each dumbbell adjusts through five settings from 4 to 25 pounds, replacing several fixed-weight pairs while fitting into the included storage box.
Best For: Beginners, apartment residents, and users focused on curls, presses, and general strength training.
Pros:
- Each dumbbell offers five weight options from 4 to 25 pounds.
- One-hand adjustment is designed to switch weights in about one second.
- Textured 33mm silicone grips help provide traction during sweaty workouts.
- Dual-lock design adjusts on the base and locks the plates when lifted.
Cons:
- The 25-pound-per-dumbbell maximum is better suited to light or moderate training.
- Adjustments must be made while the dumbbells are on their base.
Its quick adjustment and manageable maximum weight make this a straightforward space-saving choice. It is especially suitable if you want several lighter settings without storing multiple dumbbell pairs.
Highest Weight Capacity – 50-Lb Quick-Lock Adjustable Pair
For shoppers searching adjustable dumbbells under 100 with more room to progress, this SAMUP pair provides five settings from 10 to 50 pounds per dumbbell. The included bases keep the plates organized while the quick-dial system supports fast changes between exercises.
Best For: Home-gym users who want heavier adjustable dumbbells for light to moderate strength training.
Pros:
- Each dumbbell adjusts from 10 to 50 pounds, with 100 pounds combined.
- One-second dial adjustment helps maintain workout momentum.
- Dual locks adjust on the base and automatically secure plates when lifted.
- Cast-iron plates have a matte powder-coated finish and include storage bases.
Cons:
- The pair weighs 50 pounds before considering the storage bases, making it less convenient to move.
- The five settings begin at 10 pounds per dumbbell, offering less flexibility for very light exercises.
This is the strongest choice here for users who want a higher per-dumbbell ceiling while keeping a compact setup. Its 50-pound maximum per hand provides more progression than the 25-pound pair, though the starting weight is less beginner-friendly.
How We Picked the Best Adjustable Dumbbells Under 100
We focused on sets that offer useful resistance changes, practical storage, and enough versatility for common home workouts. The comparison considers advertised weight capacity, whether the listed weight is per dumbbell or for the pair, adjustment style, included accessories, and portability.
Because budget equipment can vary widely, check the current listing carefully before buying. Confirm the exact contents, maximum load, plate or handle dimensions, locking hardware, and whether a bench, connector, or storage case is included.
Quick Comparison: Adjustable Dumbbells Under $100
- Best for simple, compact training: A straightforward set with a storage case and familiar spin-lock plates.
- Best for faster adjustments: A quick-adjust design can reduce downtime between exercises, though its mechanism may require more careful handling.
- Best for exercise variety: Five-in-one sets may convert into barbells or kettlebells when the included connector and handles support those configurations.
- Best for heavier progression: Sets advertised at 70, 90, or 100 pounds offer more room to grow, but verify whether the number refers to one dumbbell or the complete set.
- Best for a ready-made station: A set bundled with a foldable bench can save space and simplify setup, but compare bench stability and weight limits.
Key Buying Factors
Weight Range and Increments
Choose a light starting weight for isolation exercises and a higher ceiling for presses, rows, lunges, and lower-body movements. Smaller increments make progression smoother, while large jumps may be less suitable for beginners or movements requiring precise loading.
Adjustment and Locking System
Spin-lock collars are generally simple and inexpensive but take longer to change. Selector-style systems are quicker, while modular handles and connectors can provide more exercise options. Whichever design you choose, plates should seat securely and remain stable during controlled movement.
Per-Dumbbell Versus Total Weight
Marketing labels can be confusing. “50 pounds” might mean a 25-pound pair or a 50-pound maximum for each dumbbell. Read the specification table and product photos, and confirm how many plates, handles, collars, and connectors are supplied.
Storage, Grip, and Durability
A case or compact tray helps keep plates organized and reduces trip hazards. Look for handles that feel comfortable without excessive play, textured grips that are not abrasive, and collars that can be tightened consistently. Keep adjustable equipment dry and inspect threads and locks periodically.
Who Should Buy Which Adjustable Dumbbells Under 100?
Beginners and apartment users should prioritize compact sets with manageable increments, dependable collars, and a storage case over maximum advertised weight. Intermediate lifters may prefer a higher-capacity set or quick-adjust mechanism that supports frequent changes between exercises. Small-space home-gym owners can benefit from five-in-one designs or a bench bundle, provided the conversion hardware is secure and the added pieces do not compromise convenience.
If you want the simplest path to general strength training, choose the set with the clearest specifications, comfortable handles, and a weight range you can use today and grow into. For heavier training, verify the per-dumbbell capacity and locking design before focusing on the headline number.