Ideal Weight Calculator
Find your ideal weight for your height and sex with four classic formulas — and compare it with the healthy BMI range.
| Formula | Ideal weight |
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For healthy adults. These are estimates, not medical advice. Ask a doctor or dietitian about your own targets — especially if you are pregnant, have a health condition or are under 18.
Ideal weight formulas
The four best-known formulas start from a base weight at 5 feet (152.4 cm) and add a fixed amount for every inch above it. They were developed in the 1960s–80s, mainly to dose medicines, and still give a useful reference point.
Devine (women): 45.5 kg + 2.3 kg per inch over 5 ft
Robinson (men): 52 kg + 1.9 kg per inch · (women): 49 kg + 1.7 kg
Miller (men): 56.2 kg + 1.41 kg per inch · (women): 53.1 kg + 1.36 kg
Hamwi (men): 48 kg + 2.7 kg per inch · (women): 45.5 kg + 2.2 kg
Example: a man of 175 cm (68.9 in, 8.9 in over 5 ft) gets between 68.7 kg (Miller) and 72.0 kg (Hamwi).
Ideal weight or healthy range?
The formulas give a single number, but a healthy weight is a range. The healthy BMI range (18.5–24.9) for 175 cm is 56.7–76.3 kg. Frame size, muscle and age all shift where you fit best within it.
Frequently asked questions
What is my ideal weight?
Enter your height and sex. The calculator shows the result of four formulas and the healthy BMI range for your height.
Which ideal weight formula is best?
None is clearly best. Devine is the most used in medicine; Robinson and Miller give slightly lower values for tall people. Use them as a guide together with the BMI range.