BMI Calculator — Body Mass Index (BMI) is a quick screening number that relates your weight to your height. It is one of the most common starting points for understanding where you stand on the weight spectrum.
Your measurements are processed in your browser and never leave your device.
BMI is a rough population-level screening tool, not a diagnosis. It does not distinguish muscle from fat and works differently across ages and ethnicities. Talk to a healthcare professional about your health.
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What is bmi calculator?
Body Mass Index (BMI) is a quick screening number that relates your weight to your height. It is one of the most common starting points for understanding where you stand on the weight spectrum.
Enter your height and weight — in metric or imperial units — and this calculator returns your BMI, the category you fall into, and the healthy weight range for your height.
How to use it
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Choose your units
Switch between metric (kg, cm) and imperial (lb, ft + in).
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Enter height and weight
The BMI updates as soon as both fields are valid.
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Read the result
See your BMI, category, and the healthy weight range for your height.
Examples
A 70 kg adult at 175 cm
A classic healthy-range example.
70 kg · 175 cm
Result: BMI ≈ 22.9 — "Healthy weight", healthy range 56.7–76.3 kg.
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Last reviewed: 2026-09-24