Ideal Body Weight Calculator
Evidence-based ideal weight range using three clinical formulas
Enter Details
cm
Results
🎯
Enter your height and gender to calculate ideal body weight.
Formula
Devine (men): 50 + 2.3 × (height in inches − 60) Hamwi (men): 48 + 2.7 × (height in inches − 60) Robinson (men): 52 + 1.9 × (height in inches − 60)
- height (cm / inches) — Standing height
Example: Male 175 cm (5'9"): Devine ≈ 71 kg, Hamwi ≈ 73 kg, Robinson ≈ 70 kg → avg ≈ 71 kg
Interpreting Your Result
Within ±10% of IBW
Healthy range
All three formulas define a range, not a single number
< IBW − 10%
Below ideal range
May indicate underweight
> IBW + 20%
Above ideal range
Use alongside BMI and body fat for full picture
Frequently Asked Questions
Which IBW formula is most accurate?
None is universally accurate. The average of Devine, Hamwi, and Robinson gives a reasonable target range.
Should I aim for my IBW?
IBW is a rough reference. A better goal is a healthy body fat % and good metabolic markers, which don't always align with IBW.