Free · Frame-Adjusted · Instant

Ideal Weight Calculator

Get your ideal weight adjusted for your actual body frame size — not just a generic height-based number — plus a realistic timeline for reaching it safely.

✓ Free Forever ✓ Frame Size Adjusted ✓ Goal Timeline

Advanced Ideal Weight Calculator

Please enter a valid gender and height to calculate.

Reference

Frame Size by Wrist Circumference

Frame size is estimated by comparing your height to your wrist circumference.

GenderSmall FrameMedium FrameLarge Frame
MaleHeight/Wrist > 10.49.6 – 10.4< 9.6
FemaleHeight/Wrist > 11.010.1 – 11.0< 10.1

Not sure of your wrist size? Use a soft tape measure around the narrowest point of your wrist, just below the wrist bone.

The Science

How We Calculate Your Ideal Weight

We average four established clinical formulas, then adjust for your body frame size.

Base Formulas (Averaged)

Devine: Men 50 + 2.3/in over 5ft | Women 45.5 + 2.3/in over 5ft Robinson: Men 52 + 1.9/in over 5ft | Women 49 + 1.7/in over 5ft Miller: Men 56.2 + 1.41/in over 5ft | Women 53.1 + 1.36/in over 5ft Hamwi: Men 48 + 2.7/in over 5ft | Women 45.5 + 2.2/in over 5ft

Frame Size Adjustment

Small frame: Average × 0.90 Medium frame: Average × 1.00 Large frame: Average × 1.10
Worked Example

Step-by-Step Example

A 170 cm (5'7") male with a large frame, currently weighing 82 kg.

1
Average of 4 formulas: ≈ 66.1 kg
2
Apply large frame adjustment: 66.1 × 1.10 = 72.7 kg ideal weight
3
Difference from current: 82 − 72.7 = 9.3 kg to lose
4
At 0.5 kg/week: 9.3 ÷ 0.5 ≈ 19 weeks (about 4.4 months)
Reference

Healthy BMI Weight Range by Height

Weight range corresponding to a healthy BMI of 18.5-24.9, by height.

HeightHealthy Weight Range
150 cm (4'11")41.6 - 56.0 kg
160 cm (5'3")47.4 - 63.7 kg
170 cm (5'7")53.5 - 71.9 kg
180 cm (5'11")59.9 - 80.6 kg
190 cm (6'3")66.8 - 89.9 kg
Who Uses This

Common Ways People Use This Calculator

🏥
Fitness Goals
Set a realistic, frame-appropriate target weight.
📈
Weight Loss Planning
Estimate a healthy goal before starting your journey.
🧙
Athletes
Consider body frame and muscle mass when evaluating weight.
🔍
General Health Check
Compare your current weight with an ideal range.
🎓
Students
Learn how height and body frame influence healthy weight.
👩‍⚕️
Healthcare Professionals
Use as a quick educational reference during consultations.
🎯
Wellness Programs
Track healthy weight goals in workplace or wellness plans.
💡
Personal Awareness
Understand whether your weight falls within a healthy target.
Get It Right

Tips for a Healthy Weight Journey

Focus on Long-Term Health

Aim for sustainable habits rather than quick results. Healthy weight management is a gradual process.

Eat a Balanced Diet

Include lean protein, whole grains, fruits, vegetables, and healthy fats to support overall health and energy.

Stay Physically Active

Combine regular cardio with strength training to improve fitness, maintain muscle mass, and support a healthy weight.

Stay Hydrated

Drinking enough water supports metabolism, digestion, and can help manage hunger throughout the day.

Monitor Your Progress

Track your weight and body measurements regularly, but remember that small fluctuations are completely normal.

Consult a Healthcare Professional

If you have medical conditions or significant weight goals, seek personalized guidance from a qualified healthcare provider.

Questions

Frequently Asked Questions

Bone structure varies naturally between people of the same height — someone with a larger frame carries more bone and muscle mass at a healthy weight than someone with a smaller frame, even at identical height.
Wrap a soft tape measure around the narrowest point of your wrist, just below the wrist bone (where a watch typically sits), and record the measurement in centimetres.
No single formula is universally correct — they were developed for different clinical purposes. We average all four (Devine, Robinson, Miller, Hamwi) and then adjust for frame size for a more personalised estimate.
We divide the difference between your current weight and your ideal weight by a sustainable rate of 0.5 kg per week, then project the number of weeks and an estimated date.
Generally yes — this is a widely cited sustainable rate for weight loss that minimises muscle loss and supports long-term adherence, for most healthy adults without underlying medical conditions.
Not directly — these formulas use height, gender and frame size, so muscular individuals often weigh more than their "ideal weight" while still being healthy. Body fat percentage is a better measure for athletic body types.
The calculator will show a "gain" timeline instead of a "lose" timeline, using the same safe rate of change assumption.
No, these formulas are designed and validated for adults. Children's healthy weight should be assessed using paediatric growth charts by a doctor.
Use our calculator above for a personalised, frame-adjusted estimate, or check the Healthy BMI Weight Range table for a broader acceptable range at your height.
BMI gives a broad healthy range based on height alone, while our ideal weight calculator uses clinical formulas plus your specific frame size for a more individualised single target.
Yes — select "Calculate from Wrist" and enter your wrist circumference, and we'll determine your frame size automatically using the height-to-wrist ratio method.
Faster rates are sometimes used under medical supervision, particularly for higher starting weights, but generally carry a higher risk of muscle loss and are harder to sustain — consult a doctor before pursuing an aggressive timeline.
The formulas used here don't directly adjust for age, though body composition naturally shifts with age (typically less muscle, more fat at the same weight) — worth keeping in mind when interpreting your result.
No. All calculations run entirely in your browser — nothing you enter is sent to or stored on our servers.
This calculator adds two things a basic weight calculator typically doesn't: a frame-size adjustment (via wrist circumference) and a personalised timeline for reaching your target safely.
Read Next

Guides & Articles

Know Your Real Target Weight

Get a number personalised to your actual frame — plus a realistic plan to reach it.

✓ Frame-Adjusted ✓ 4 Formulas ✓ Goal Timeline