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BMI Calculator

18.5 to 24.9 for adults (WHO). Doctors in South Asia often watch from 23, because health risks start at a lower BMI.

Weight in kg ÷ (height in metres × height in metres). 75 kg at 1.70 m is 26.

Free BMI calculator: your body mass index from weight and height, its WHO category, and the healthy weight range for your height.

Weight (kg)Height (cm)

Your BMI

Overweight

Healthy weight for your height53.5 – 72 kg

About 3 kg above the healthy range

💡 Good to know

BMI is a quick screening number for adults. It doesn't measure body fat, so very muscular people can score high.
For children and teens, doctors use age and sex growth charts instead.
Waist size matters too: talk to your doctor about your health.

WHO adult BMI bands. Not medical advice. 🔒 Everything stays on your device.

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We build every tool from the official rules and re-check them when they change. Always confirm with the official source before you rely on a result.

🛠️ Spotted a mistake or an out-of-date rule? Tell us

What is a healthy BMI?+

18.5 to 24.9 for adults (WHO). Doctors in South Asia often watch from 23, because health risks start at a lower BMI.

How is BMI calculated?+

Weight in kg ÷ (height in metres × height in metres). 75 kg at 1.70 m is 26.