BMI Calculator
Enter your height and weight to get your body mass index and the matching WHO category, plus the weight range considered healthy for your height.
Free · No sign-up · Private — runs in your browser
Your BMI22.5Normal weight
Healthy weight range for your height (BMI 18.5–24.9): 53.5 kg – 72.0 kg. BMI is a screening tool, not a diagnosis — talk to a health professional for personal advice.
How to use the BMI Calculator
- Choose metric or imperial units.
- Enter height and weight.
- Read your BMI, category and healthy range.
Why use this bmi calculator?
- Metric and imperial
- WHO categories
- Healthy weight range for your height
Frequently asked questions
How is BMI calculated?
BMI = weight in kilograms ÷ height in metres squared. For pounds and inches the formula is 703 × lb ÷ in².
What is a healthy BMI?
The WHO lists 18.5 to 24.9 as the normal range for most adults.
Is BMI always accurate?
No. BMI does not separate muscle from fat, so athletes may score high. It is a screening number, not a diagnosis — speak with a health professional for advice.