BMI is not a direct body-fat measurement
BMI uses only height and weight and cannot distinguish muscle, fat distribution, pregnancy or individual body composition.
Health
BMI calculator
Estimate body mass index from metric height and weight.
Clear and dependable
How to use this calculator
Enter your weight in kilograms and height in centimetres to estimate Body Mass Index.
Understanding the result
BMI is a screening estimate based on height and weight. It does not directly measure body fat or diagnose a health condition.
Avoid these errors
Common mistakes
Use consistent units
Metric BMI requires kilograms and metres; centimetres must be converted to metres before squaring height.
Common questions
Are intermediate values rounded?
No. Full practical precision is retained during calculation and rounding is applied only to the displayed values.
What limitations should I consider?
BMI is a screening estimate, not a diagnosis. Discuss health concerns with a qualified professional.