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BMI Calculator
Body mass index (BMI) is weight divided by height squared and gives a general indication only. Consult a doctor for a proper health assessment.
How to use
- Enter your height in centimeters.
- Enter your weight in kilograms.
- Your BMI and category are shown.
Frequently asked questions
How is BMI calculated?
BMI = weight (kg) / height (m)². For 70 kg and 175 cm: 70 / 1.75² ≈ 22.9.
What is a normal BMI?
The WHO considers 18.5 to 24.9 normal.
Is BMI accurate for everyone?
No. It ignores muscle mass, age and sex, so treat it as a rough guide.
Is BMI valid for everyone?
No. It can mislead for muscular athletes, pregnant women, children and older adults. Ask your doctor before drawing conclusions.
How do I find a healthy weight range?
Multiply the healthy BMI range of 18.5 – 24.9 by your height in metres squared.