BMI Calculator
Body Mass Index from weight and height, in metric or imperial units, with the standard weight category for the result.
Body Mass Index from weight and height, in metric or imperial units, with the standard weight category for the result.
Formula
BMI = weight in kilograms / (height in metres squared).
Example
70 kg and 175 cm gives BMI 22.9, which is in the healthy range.
How to use it
- Pick metric or imperial units.
- Enter weight and height.
- Press Calculate.
- Read the BMI value and its weight category.
Frequently asked questions
What are the BMI categories?
Underweight is below 18.5, healthy is 18.5 to 24.9, overweight is 25 to 29.9, and obese is 30 and above.
Does BMI work for everyone?
BMI is a screening measure. It does not distinguish muscle from fat, so athletes and children need different interpretation.
Metric or imperial?
Both. Pick kilograms and centimetres, or pounds and inches, and the calculator converts for you.