About this tool
Switch between metric (kg and cm) and imperial (lb and ft/in) units, enter your weight and height, and get your Body Mass Index with its category — underweight, normal, overweight or obese. The calculation runs entirely in your browser.
Frequently asked questions
What BMI ranges are used?
Below 18.5 is underweight, 18.5–24.9 normal, 25–29.9 overweight, and 30 or above is obese.
Does it store my data?
No. Your weight and height stay on your device — everything is computed locally in JavaScript.