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BMI Calculator
Body mass index from your height and weight - metric or imperial - with the WHO category and your ideal weight range. Calculated in your browser. No sign-up, free.
Details
Results
Your BMI22.9
- Category
- Normal
- Ideal weight range
- 56.7–76.3 kg
Runs 100% in your browser Instant results as you type Free, no sign-up
How to calculate your BMI
Pick your units
Metric takes kilograms and centimeters; imperial takes pounds, feet and inches.
Enter height and weight
The BMI updates live as you type.
Read the assessment
Your BMI value, the WHO category it falls into, and the weight range that would put you in the normal band for your height.
BMI questions, answered
Is my data sent to a server?
No. Height and weight are processed in your browser only. Body data is health data - it never leaves your device and is never logged.
What do the categories mean?
WHO bands: below 18.5 underweight, 18.5–24.9 normal, 25–29.9 overweight, 30+ obese. They are population-level screening bands, not a diagnosis.
Is BMI accurate for everyone?
It is a useful screen but blind to composition - muscular athletes read high, and it is not designed for children, pregnancy or the very elderly. Treat it as a starting point, not a verdict.
What is the ideal weight range shown?
The weights that would give you a BMI of 18.5 to 24.9 at your height - the WHO normal band translated into your units.