Last updated: October 31, 2026 · By the ThriveWay Fitness Editorial Team
Quick answer
Most beginners should buy adjustable dumbbells that go up to at least 50 lb per hand. If you already lift, are training legs seriously, or want the set to last several years, choose 70–90 lb or an expandable set. A set that tops out at 25–30 lb is only enough for upper-body toning and light accessory work, and most people outgrow it quickly.
In this guide
- Step 1: Know Which Exercises You’ll Do
- Step 2: Pick Your Maximum Weight
- Step 3: Check the Starting Weight and Increments
- Recommendations by Profile
- Signs You’ve Outgrown Your Dumbbells
- A Closer Look: How Fast Will You Progress?
- Weight Planning by Training Goal
- Men vs Women: Does It Change the Recommendation?
- Two People Sharing One Set
- Budget vs Range: Making Trade-Offs
- How to Test Your Starting Weights at Home
- Common Sizing Mistakes
- Exercise-by-Exercise Planning Guide
- What If You Outgrow Your Set Anyway?
- Our Recommendation in One Sentence
- Real-World Examples
- Quick Decision Checklist
- Frequently Asked Questions
Buying adjustable dumbbells is a bet on your future strength. Go too light and you’ll need a second set within a year; go too heavy and you’ve paid for weight you may never use, often with a bulkier dumbbell and a higher starting weight. This guide helps you pick the right maximum weight, starting weight and increments based on your experience and the exercises you plan to do.
Step 1: Know Which Exercises You’ll Do
Different exercises use very different loads. The same person might curl 20 lb, press 40 lb and goblet-squat 60 lb. Your heaviest exercise sets the maximum you need; your lightest sets the starting weight and increments you need.
| Exercise | Typical beginner (per hand) | After 6–12 months (per hand) |
|---|---|---|
| Lateral raise | 5–10 lb | 10–20 lb |
| Biceps curl | 10–20 lb | 20–35 lb |
| Shoulder press | 10–25 lb | 25–50 lb |
| Bench / floor press | 15–30 lb | 35–70 lb |
| One-arm row | 15–30 lb | 40–80 lb |
| Goblet squat (one dumbbell) | 20–35 lb | 50–90 lb |
| Romanian deadlift | 15–30 lb | 40–80 lb |
These ranges are general guidance for healthy adults and vary widely with body size, sex, age and training history. Start lighter than you think and focus on good form.
The pattern is clear: lower-body and pulling exercises quickly need far more weight than arm and shoulder work. If you’ll train legs with dumbbells, your maximum needs to be much higher.
Step 2: Pick Your Maximum Weight
Up to 25–30 lb: light toning only
Good for arms, shoulders, rehab work, older adults or adding resistance to cardio-style workouts. Most people outgrow this range for presses, rows and squats within months.
Up to 50–55 lb: the sweet spot for most beginners
Covers almost all upper-body work for beginners and intermediates, and decent lower-body training for the first year or two. This is where popular sets like the Bowflex SelectTech 552 sit, and it’s the right starting point for most people.
Up to 70–90 lb: long-term and stronger lifters
Choose this if you already lift, you’re a larger or stronger person, or you plan to make dumbbells your main training tool, including legs. Heavy one-arm rows, goblet squats and split squats will use the top of this range.
Expandable sets: buy now, grow later
Some designs, notably PowerBlock, let you start at 50 lb and add expansion kits later. That spreads the cost and removes the guesswork. We compare these options in our best adjustable dumbbells guide.
Step 3: Check the Starting Weight and Increments
Heavier sets often start at 10 lb instead of 5 lb and change in 5 or 10 lb jumps. That’s a problem for small-muscle exercises. Going from 10 to 15 lb on a lateral raise is a 50% jump — far too much for steady progress.
- Ideal: starting at 5 lb with 2.5 lb steps at the light end.
- Acceptable: 5 lb steps throughout.
- Frustrating for accessories: 10 lb starting weight or 10 lb jumps.
If you love heavy training but also do lots of shoulder and arm work, a hybrid setup — a heavy adjustable set plus one light fixed pair — solves this neatly. See adjustable vs fixed dumbbells for that approach.
Recommendations by Profile
| Your situation | Recommended range |
|---|---|
| Complete beginner, general fitness | 5–50 lb |
| Beginner focused on toning, rehab or older adult | 2.5/5–25 or 30 lb |
| Some lifting experience, full-body training | 5–70 lb or expandable |
| Experienced lifter, dumbbells as main equipment | 10–90 lb or expandable to 90 lb |
| Two people of different strength sharing | 5–50 lb minimum, or two separate sets |
Signs You’ve Outgrown Your Dumbbells
- You can do more than 15–20 clean reps of goblet squats or rows at the heaviest setting.
- You’re adding pauses and slow tempos just to make the top weight challenging.
- Your progress has stalled on lower-body exercises while upper body still improves.
At that point, an expansion kit, a heavier set, or adding a kettlebell or barbell is the next step.
A Closer Look: How Fast Will You Progress?
Most beginners get stronger quickly in the first months of training, mainly because the nervous system learns to coordinate muscles more efficiently. That’s great news — but it means a set that feels heavy on day one can feel light by month three, especially for squats, lunges and rows. Lower-body and back exercises typically progress fastest, while shoulders and arms progress slowly in small steps.
Practically, that means two things: your maximum weight should be chosen for your strongest exercise a year from now, and your increments should be chosen for your weakest exercise today.
Weight Planning by Training Goal
General fitness and toning
If your goal is to feel fitter, build some muscle and support daily activities, a 5–50 lb set covers almost everything. You’ll use 5–20 lb for upper-body accessories and 25–50 lb for squats, deadlifts and rows.
Building muscle
Muscle growth needs sets taken close to fatigue. As you progress, that requires heavier loads, especially for legs and back. A 70–90 lb set or an expandable system keeps you progressing for years.
Strength for sports or hiking
Split squats, step-ups and single-leg deadlifts benefit from heavier dumbbells held in each hand. Plan for at least 50–70 lb per hand if you’re fairly strong already.
Rehab, mobility and older adults
Fine increments and light starting weights matter most. A set that starts at 2.5–5 lb with small steps — or a few light fixed pairs — is ideal. Follow guidance from a physical therapist where relevant.
Men vs Women: Does It Change the Recommendation?
Averages differ, but individual variation is huge. Plenty of women outlift plenty of men. Rather than choosing by gender, choose by your current strength in a few key lifts. If you can goblet-squat 30 lb for 10 reps today, plan for 50 lb or more within a year.
Two People Sharing One Set
If two people of different strength levels will share, choose a set with a wide range — 5 lb at the bottom for the lighter lifter and 50+ lb at the top for the stronger one. Expect to spend time changing weights between sets, or consider adding one pair of fixed dumbbells at the most common weight.
Budget vs Range: Making Trade-Offs
| If your budget is… | Consider | Trade-off |
|---|---|---|
| Tight | Spin-lock set with extra plates | Slow changes but expandable and durable |
| Moderate | 5–50/55 lb dial or selector set | May need an upgrade for heavy leg work later |
| Flexible | Expandable pin system or 80–90 lb set | Higher upfront cost, longest lifespan |
How to Test Your Starting Weights at Home
- Pick three exercises: goblet squat, one-arm row and shoulder press.
- Use household objects or a friend’s dumbbells to find a load you can lift for 10 controlled reps with 2 reps left in reserve.
- Double the heaviest of those loads — that’s a sensible minimum ceiling for your set.
- Note the lightest load — that tells you how low (and how fine) your starting increments should be.
Common Sizing Mistakes
- Buying for today’s strength instead of next year’s.
- Choosing a 10 lb starting weight when you need light shoulder work.
- Ignoring how long and bulky heavy-capacity sets are at light settings.
- Forgetting a stand — heavier sets are awkward to lift from the floor.
Understanding the mechanisms helps too: here’s how adjustable dumbbells work, and whether adjustable or fixed fits you better.
Exercise-by-Exercise Planning Guide
Use this as a practical shopping list. Write down your current working weight (10 good reps) for each movement, then look at the “in 12 months” column to see whether your planned set will still challenge you.
| Movement | Muscles | Progress speed | Increment you’ll want |
|---|---|---|---|
| Goblet squat | Quads, glutes | Fast | 5 lb |
| Romanian deadlift | Hamstrings, glutes | Fast | 5 lb |
| One-arm row | Lats, upper back | Moderate–fast | 5 lb |
| Bench/floor press | Chest, triceps | Moderate | 2.5–5 lb |
| Shoulder press | Shoulders | Slow | 2.5 lb |
| Curls, lateral raises | Arms, delts | Slow | 2.5 lb |
The pattern explains why “one weight fits all” doesn’t exist: you need heavy capacity for the top of the table and fine steps for the bottom.
What If You Outgrow Your Set Anyway?
You have more options than buying a whole new set:
- Slow the tempo: 3–4 second lowering phases make lighter weights harder.
- Single-leg and single-arm variations: Bulgarian split squats and single-leg Romanian deadlifts roughly double the load per leg.
- Pauses and 1.5 reps: add time under tension at the hardest point.
- Add a kettlebell or sandbag for heavy lower-body work.
- Buy expansion kits if your system supports them.
Our Recommendation in One Sentence
If in doubt, buy a set that reaches at least 50 lb with 2.5–5 lb steps at the light end — and go to 70–90 lb (or expandable) if you already train or plan to make dumbbells your main equipment. Compare specific models in our best adjustable dumbbells guide.
Real-World Examples
Maria, 34, new to lifting: she can goblet-squat 20 lb and press 10 lb. A 5–52.5 lb dial set gives her fine steps for presses and plenty of room for squats over the next year.
James, 41, used to lift in college: his rows and lunges will quickly pass 50 lb. An 80–90 lb set or an expandable system saves him buying twice.
Ruth, 67, building strength after a long break: light pairs of 3, 5 and 8 lb, or a set with 2.5 lb steps from 5 lb, suit her goals better than a heavy set that starts at 10 lb.
These are illustrative profiles, not real customers — but they show how the same question leads to different answers.
Quick Decision Checklist
- ☐ My heaviest planned exercise (usually goblet squats or rows) will still be challenging at the set’s top weight a year from now.
- ☐ The set starts light enough for my shoulder and arm work.
- ☐ Increments are 2.5 lb (or 5 lb at most) where I need them.
- ☐ I’ve measured my space for the trays and a stand.
- ☐ I know whether I’ll want to expand later — and whether this system allows it.
Tick all five and you’ve found the right size. Then follow a simple plan like our full-body adjustable dumbbell workout to put every pound to good use.
Frequently Asked Questions
Is 50 lb adjustable dumbbells enough?
For most beginners and many intermediates, yes — especially for upper-body work. Strong lifters training legs with dumbbells may outgrow 50 lb within a year or two.
What weight dumbbells should a woman start with?
Many women start with 5–15 lb for upper-body exercises and 15–30 lb for lower-body work, but strength varies widely. A 5–50 lb adjustable set covers both and allows progress.
Should I buy 25 lb or 50 lb adjustable dumbbells?
Unless you only plan light toning or rehab exercises, choose 50 lb. Most people outgrow 25 lb quickly on presses, rows and squats.
Are heavier adjustable dumbbells harder to use?
They’re usually longer and heavier even at low settings, and they may start at 10 lb. That can make light exercises less comfortable.
How heavy should adjustable dumbbells be for a man?
Many men who already train choose sets reaching 70–90 lb per hand. Beginners often start well with 50 lb sets but may outgrow them on leg exercises.
Can I buy a light set now and upgrade later?
Yes, but it usually costs more overall. Expandable systems such as PowerBlock make upgrading cheaper.
Is 25 lb dumbbells enough for a beginner?
For upper-body toning, possibly. For squats, rows and long-term progress, most beginners need more within months.
What dumbbell weight is best for lateral raises?
Most people use light weights for lateral raises, often 5–15 lb, and progress in small 2.5 lb steps.
