BMI Calculator
Calculate your Body Mass Index and see the WHO weight category.
How to use the BMI Calculator
- Select metric (kg, cm) or imperial (lbs, ft/in).
- Enter your weight and height.
- Click Calculate to see BMI, category, and healthy weight range.
Examples & tips
Example: 70 kg at 175 cm → BMI 22.9 (Normal weight). Healthy weight range for 175 cm is roughly 56.7–76.3 kg.
Note: BMI is a screening tool, not a diagnosis. Consult a clinician for health advice.
Frequently asked questions
What formula is used?
BMI = weight (kg) / height (m)². For imperial units, the tool converts to metric first.
Does BMI apply to children or athletes?
No. BMI guidelines are for adults. Athletes with high muscle mass and children under 18 should use specialised charts.
What is the healthy weight range?
For any height, healthy weight = BMI 18.5–24.9 × height². Both bounds are displayed.