About the BMI Calculator
Body Mass Index is a quick screening measure that compares weight with height. It doesn't measure body fat directly and isn't a diagnosis, so talk to a doctor about your health.
How to use
- Enter your height in cm and weight in kg.
Formula
BMI = weight (kg) ÷ height (m)²
Frequently asked questions
How is BMI calculated?
BMI is weight in kilograms divided by height in metres squared. For example, 68 kg ÷ (1.70 m)² ≈ 23.5.
What is a healthy BMI?
For most adults, a BMI from 18.5 to 24.9 is considered a healthy weight range. 25–29.9 is overweight and 30 or more is obese.
Is BMI accurate for everyone?
No. BMI does not measure body fat directly and can mislead for athletes, older adults and some ethnic groups. Use it as a rough guide and talk to a doctor.