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Health calculator

BMI Calculator for Men & Women

Check your Body Mass Index in seconds. Enter your height and weight to get your BMI, WHO category, and healthy weight range.

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The BMI formula

BMI = weight (kg) ÷ height (m)². The most widely used quick screen for a healthy weight.

What the categories mean

Under 18.5 underweight, 18.5–24.9 healthy, 25–29.9 overweight, 30+ obese (WHO).

Why BMI isn't the whole story

BMI doesn't tell muscle from fat. Use it as a starting point.

FAQ

Is BMI accurate for everyone? +
A useful screen for most adults, less so for athletes or pregnancy.
What's a healthy BMI? +
Generally 18.5–24.9.
Is my data stored? +
No — it runs in your browser only.