BMI calculator
Enter your height and weight to get your BMI, see if you're underweight, healthy or overweight on the WHO or Asian scale, and your healthy weight range.
How to calculate your BMI
- Choose your units (feet and pounds, or cm and kg) and enter your height and weight.
- Pick the scale: WHO (international) or Asian.
- See your BMI, which range it falls in, and the healthy weight range for your height.
Frequently asked questions
BMI = weight (kg) ÷ height (m)². In pounds and inches: 703 × weight (lb) ÷ height (in)². For example 5 ft 10 in and 160 lb gives a BMI of about 23.
On the WHO scale: under 18.5 is underweight, 18.5–24.9 is healthy, 25–29.9 is overweight and 30 or more is obese. The Asian scale counts 23 and up as overweight and 25 and up as obese.
People of Asian descent tend to carry more body fat at the same BMI, so health risks such as diabetes start earlier. Many Asian countries use lower cut-offs for that reason.
No. Children and teens under 18 need growth charts by age and sex. BMI is also misleading during pregnancy, for very muscular people and for older adults.
No. BMI is a quick rough guide that can't tell fat from muscle. If you're worried about your weight or health, talk to a doctor or dietitian.
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