Ideal Weight Calculator
Compare ideal body weight from the Devine, Robinson, Miller and Hamwi formulas with the healthy BMI range for your height.
About the Ideal Weight Calculator
These formulas were designed for medical uses such as drug dosing, not as personal targets. They only use height and sex, so they ignore muscle and frame size. The healthy BMI range is the more widely used guide for adults.
Each formula starts from a base weight at 5 feet (152.4 cm) and adds a fixed amount per inch above that.
The formula
Devine (1974): men 50 kg + 2.3 kg per inch over 5 ft; women 45.5 kg + 2.3 kg
- Robinson (1983)
- men 52 + 1.9 kg/in; women 49 + 1.7 kg/in
- Miller (1983)
- men 56.2 + 1.41 kg/in; women 53.1 + 1.36 kg/in
- Hamwi (1964)
- men 48 + 2.7 kg/in; women 45.5 + 2.2 kg/in
Worked example
Example: Average of four formulas = 214 lb
- Inputs: Units: lb / ft; Sex: Male; Height: 6 ft; and: 10 in.
- Formula: Devine (1974): men 50 kg + 2.3 kg per inch over 5 ft; women 45.5 kg + 2.3 kg
- Result: Average of four formulas = 214 lb
Things to keep in mind
- This is an estimate for general information, not medical advice. Talk to a doctor or other qualified professional about your health.
- For heights under 5 ft the formulas aren't designed to be used.
Questions people ask
Which formula is best?
None is best for everyone. Use them as a rough range together with BMI, waist size and how you feel.
Why are the results so different?
They were fitted to different populations and life-insurance tables decades apart.