BMI Calculator — Body Mass Index and Daily Calories
Calculate BMI from height and weight, see the WHO or Chinese category, and estimate BMR and daily calorie needs.
Processed locally in your browser. Nothing is uploaded.
How to use
- Enter height and weight, plus age and sex if you like.
- Choose the standard and activity level.
- Review BMI, healthy range and calorie estimates.
Example and rules
Example: 170 cm and 65 kg gives a BMI of 22.5, in the normal range.
- BMI = weight (kg) ÷ height (m)².
- BMR uses the Mifflin-St Jeor equation.
- Not for children, pregnancy or very muscular people; not medical advice.
Frequently asked questions
How do the Chinese and WHO standards differ?
China uses 24 for overweight and 28 for obesity; WHO uses 25 and 30.
Are imperial units supported?
Yes, switch to feet, inches and pounds.
Is my data stored?
No. It is used on this page only.