BMI Calculator
Body mass index with WHO category and healthy weight range. Calculate your BMI (body mass index) in metric or imperial units. Instant WHO category, healthy weight range for your height and ideal target weight. Free BMI calculator.
About the BMI Calculator
BMI compares your weight to your height to screen for underweight, healthy, overweight and obese ranges. Enter your height and weight in metric or imperial units and this calculator returns your BMI, your WHO category, the healthy weight range for your height, and how many kilograms you would need to gain or lose to reach it. BMI is a screening tool rather than a diagnosis — muscular athletes often score "overweight" despite low body fat — so treat the number as a starting point, not a verdict.
How to use the BMI Calculator
- Choose metric or imperial units.
- Enter your height and weight.
- Read your BMI and WHO category.
- Check the healthy weight range for your height.
Key features
- Metric (kg/cm) and imperial (lb/ft-in) units
- WHO category: underweight to obese
- Healthy weight range for your height
- Weight change needed to reach a healthy BMI
What is a healthy BMI?
Is BMI accurate for everyone?
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