Muscle or Fat
BMI uses only height and weight, so it cannot tell muscle from body fat.
BMI Calculator
Free, Private, and in Your Units
Enter your height and weight in whichever units you use, and see what your result means, including the lower cut-offs used for many Indian adults.
Your result will appear here
Enter your height and weight to see your BMI, what it means, and the usual weight range for your height.
Your BMI
- General WHO cut-offs
- Lower cut-offs for many Indian adults
- Usual weight range at your height
- What you entered, converted
BMI is a rough screening measure. It does not reflect body composition, and it is not meant for children or during pregnancy. A consultation gives a fuller picture. This is general information, not individual medical advice. Nothing you enter here is stored or sent.
What the Numbers Mean
BMI is your weight divided by the square of your height. These are the ranges for adults. Many South Asian adults can face health risks at a lower BMI, which is why two sets of cut-offs are shown.
BMI = weight in kg ÷ (height in m × height in m)
| Range | General (WHO) | Many Indian adults |
|---|---|---|
| Below the usual range | Under 18.5 | Under 18.5 |
| Within the usual range | 18.5 to 24.9 | 18.5 to 22.9 |
| Above the usual range | 25 to 29.9 | 23 to 24.9 |
| Well above the usual range | 30 or more | 25 or more |
What BMI Can't Tell You
Your Overall Health
Blood reports, blood pressure, sleep, and activity all say more about your health.
Your Age or Stage
It is not meant for children or during pregnancy, and it can read differently in older adults.
Want More Than a Number?
Weight Management
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Long-Term Conditions
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A Realistic Pace of Change
Read what healthy weight change can look like, week to week.
Questions About BMI
Clear Answers, No Jargon
How is BMI calculated?
BMI is your weight in kilograms divided by the square of your height in metres. Whichever units you enter, the calculator converts them first, so the answer is the same.
Why are there two sets of cut-offs?
The general cut-offs come from the World Health Organization. Research shows that many South Asian adults can face health risks such as type 2 diabetes at a lower BMI, so guidelines for Indian adults use lower cut-offs. The calculator shows both.
Is BMI accurate?
It is a quick screening measure, not a diagnosis. It does not separate muscle from fat or show where you carry weight, so a muscular person can have a high BMI and still be healthy.
Can I use this for children or during pregnancy?
No. Children are assessed with age-specific growth charts, and weight during pregnancy is assessed differently. Please speak to your paediatrician or doctor instead.
What should I do with my result?
Treat it as one piece of information. If your result worries you, or your weight has changed without you trying, talk to your doctor or a qualified professional, who can look at your whole health.
Is my information saved?
No. The calculator runs entirely in your browser. Nothing you enter is stored or sent to anyone.
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