Ideal Weight Calculator

Ideal body weight formulas

Formula	Men	Women
Devine	50 kg + 2.3 kg per inch over 5 ft	45.5 kg + 2.3 kg per inch over 5 ft
Robinson	52 kg + 1.9 kg per inch	49 kg + 1.7 kg per inch
Miller	56.2 kg + 1.41 kg per inch	53.1 kg + 1.36 kg per inch
Hamwi	48 kg + 2.7 kg per inch	45.5 kg + 2.2 kg per inch

Worked example

For a man 5 ft 10 in tall, the Devine formula gives 50 + 2.3 × 10 = 73 kg (161 lb). The healthy BMI range of 18.5–24.9 works out to about 129–174 lb.

Ideal weight formulas are rough population estimates, not personal targets. Muscle mass, body composition and health history all matter. Speak with a doctor or registered dietitian for personal guidance.

Frequently asked questions

Which ideal weight formula is best?

None is best for everyone. They give similar results for average heights and differ more for very short or tall people.

Why do the formulas give different answers?

They were developed from different data sets and for different purposes, mainly estimating drug doses.

Does ideal weight account for muscle?

No. Athletes with more muscle often weigh more than these estimates while being very healthy.

Is BMI a better guide?

BMI gives a range rather than a single number, but it also does not measure body fat directly.