BMI Calculator - Body Mass Index
Work out your body mass index in seconds. Enter your weight and height in metric or imperial units and this free BMI calculator shows your BMI value, weight category and the healthy weight range for your height. Switch between the WHO international standard and the stricter Asian/Thai cut-offs, and see exactly where you sit on the BMI scale. Everything is calculated in your browser — nothing is uploaded.
Your BMI will appear here
Enter your weight and height to calculate your BMI.
Your BMI Body mass index = weight (kg) ÷ height (m) squared.
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Category Where your BMI falls on the selected classification.
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Healthy weight range The weight range for a normal BMI at your height.
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Where you sit on the BMI scale
- Underweight
- Normal weight
- Overweight
- Obese
BMI is a general screening tool, not a diagnosis. It does not account for muscle mass, body composition, age or pregnancy. Consult a doctor for personal advice.
How to use
- Pick metric (kg / cm) or imperial (lb / ft-in) units.
- Enter your weight and height; height accepts centimetres or metres.
- Choose the WHO standard or Asian/Thai cut-offs for classification.
- Read your BMI value, category and healthy weight range instantly.
- Use the colour scale to see where your BMI falls, then copy the result.
Features
- Metric and imperial units with feet-and-inches height entry
- WHO international and Asian/Thai BMI cut-offs
- Healthy weight range calculated for your exact height
- Colour-coded BMI scale with a marker for your result
- Copy your BMI summary in one click
- 100% in-browser — your data never leaves your device