How to Calculate BMI (Weight / Height squared)
BMI = weight (kg) / height (m) squared. For 170 cm and 70 kg: 70 / 1.70^2 = 24.2. WHO classifies 18.5-24.9 as normal weight (general information, not medical advice).
Open the interactive Everyday Lifestyle tool →Formula: BMI = kg / m^2
Key facts
| Formula | BMI = kg / m^2 |
|---|---|
| 170 cm, 70 kg | BMI 24.2 |
| 160 cm, 50 kg | BMI 19.5 |
| WHO normal range | 18.5-24.9 |
| WHO obese | >= 30 |
Frequently asked questions
What is a normal BMI?
WHO classifies 18.5-24.9 as normal, 25.0-29.9 as overweight, and >= 30 as obese. This is general information only.
What is the BMI for 165 cm and 60 kg?
BMI 22.0: 60 / 1.65^2 = 22.0, which is in the normal range.
Do I use meters or centimeters for BMI?
Use meters. Convert cm to m first (170 cm = 1.70 m), then square it: BMI = kg / m^2.
Related pages
The calculations on this page are estimates based on common general-purpose formulas. They are not medical advice -- consult a doctor or other qualified professional for decisions about your health.
BMI Calculator is part of Everyday Lifestyle on GOAT Lab — a free reference you can use without signing up, and it works offline. Open the tool above for any custom value.
Part of GOAT Lab — 26 free, browser-based science, engineering and developer tools. No sign-up.