Ideal Body Weight
Calculate ideal body weight using the Devine, Robinson, and Hamwi formulas in metric and imperial units. Used in clinical dosing and nutritional assessment.
Devine (kg)
65.9
Robinson (kg)
65.2
Hamwi (kg)
66.7
Educational tool. Not a substitute for clinical judgment, professional diagnosis, or treatment. Always verify with current guidelines.
How to use the ideal body weight
Enter height in cm and select sex. Three popular IBW formulas compute side-by-side.
Formula & explanation
Devine: 50 (♂) / 45.5 (♀) kg + 2.3 kg per inch over 5 ft. Robinson: 52/49 + 1.9. Hamwi: 48/45.5 + 2.7.
Examples
Male, 170 cm (5'7"): Devine ≈ 66.1 kg, Robinson ≈ 65.3 kg, Hamwi ≈ 66.9 kg.
Frequently asked questions
- Below 5 ft?
- Devine is undefined below 5 ft. Some references suggest subtracting 2.3 kg/inch below 5 ft, but it's an extrapolation — use clinical judgment.
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