Ideal Weight Calculator
Estimate a healthy ideal body weight range in kilograms using the Hamwi and Devine formulas based on your height and sex.
Your results
Calculation breakdown
- Devine formula
- Ideal weight (kg) = 50 (men) / 45.5 (women) + 2.3 × inches over 5 ft
- Hamwi formula
- Ideal weight (kg) = 48 (men) / 45.5 (women) + 2.7 × inches over 5 ft
Worked example
A 175 cm tall man has an estimated ideal weight of around 71 kg, averaging the Devine and Hamwi formulas, with a healthy range of roughly 64–78 kg.
Assumptions
- These formulas are based on height and sex only, not frame size or muscle mass.
- Treat the result as a general reference range rather than a strict target.
How this calculator works
This calculator estimates ideal body weight using the well-known Devine and Hamwi formulas, which are based on height and sex, then averages the two estimates to give a healthy weight range in kilograms. It is a general guide only, since factors like frame size and muscle mass are not accounted for.
Frequently asked questions
Which formulas are used?
This calculator averages the Devine formula and the Hamwi formula, two long-standing methods for estimating ideal body weight from height.
Does this account for body frame or muscle mass?
No, these formulas are based only on height and sex, so muscular individuals may naturally sit above the suggested range.
Should I aim for the exact number shown?
Treat the result as a general reference range rather than a precise target; a healthy weight varies from person to person.
Results are estimates only and are not financial, tax, legal or credit advice.