CalcIdeal Weight Calculator
Last updated: 2026-05-09
The Ideal Weight Calculator is a free health calculator. Calculate your ideal weight for your height using Lorentz and Devine formulas. Get evidence-based estimates to improve your wellbeing.
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Common Sizes — Click to Fill
| Height (cm) (cm) | Sex (1=Male, 2=Female) (1=H 2=M) | |
|---|---|---|
| Child | 100 cm | 1 1=H 2=M |
| Teen | 131.25 cm | 1 1=H 2=M |
| Adult (F) | 175 cm | 1 1=H 2=M |
| Adult (M) | 250 cm | 2 1=H 2=M |
| Elderly | 250 cm | 2 1=H 2=M |
What is ideal body weight?
Ideal body weight is a weight range considered healthy for a person of a given height, age, and sex. Several formulas exist; the most widely used are Broca, Hamwi, and the healthy BMI range method.
Ideal weight formulas
- Broca formula: Men: Height(cm) − 100; Women: Height(cm) − 105
- Hamwi formula: Men: 106 lb + 6 lb per inch over 5 ft; Women: 100 lb + 5 lb per inch over 5 ft
- Healthy BMI range: Weight between BMI 18.5 and 24.9 for your height.
Practical example
Woman, 5'5" (165 cm) tall:
- Hamwi: 100 + 5×5 = 125 lbs (56.7 kg)
- BMI range: 50.3 kg to 67.8 kg (111 – 149 lbs)
Important limitations
- Doesn't account for body composition (muscle vs fat).
- Formulas were developed in specific populations and may not apply universally.
- "Ideal" weight varies with bone structure (small, medium, large frame).
Related calculators: BMI Calculator · Healthy Weight Range Calculator · Daily Calorie Calculator