Friendly Toolkit
BMI Calculator
What's my BMI?
Body mass index for adults in metric or US units, with your healthy weight range.
Free, private, no sign-up
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Suggest an improvementHow BMI is calculated
BMI is your weight in kilograms divided by your height in metres, squared. 70 kg at 1.75 m gives 70 ÷ 1.75² = 22.9.
| Category | WHO | Asian cut-offs |
|---|---|---|
| Underweight | below 18.5 | below 18.5 |
| Healthy weight | 18.5 – 24.9 | 18.5 – 22.9 |
| Overweight | 25 – 29.9 | 23 – 27.4 |
| Obesity | 30 and above | 27.5 and above |
Good to know
Why are there Asian cut-offs?
A WHO expert consultation (2004) found that health risks rise at a lower BMI in many Asian populations, and India's guidelines use lower thresholds too.
Is BMI accurate for everyone?
No. It doesn't tell muscle from fat, so athletes may score high, and it isn't meant for children, teens or pregnancy. It's a screening number, not a diagnosis.