BMI Calculator
Calculate your Body Mass Index instantly with metric or imperial units. Get your BMI score, category (underweight, normal, overweight, obese) and healthy weight range.
How to use this bmi calculator
- 1
Choose metric (kg / cm) or imperial (lb / ft in) units.
- 2
Enter your height and weight.
- 3
Your BMI, category and healthy weight range appear instantly.
Frequently asked questions
▸What is a healthy BMI range?
For most adults a BMI between 18.5 and 24.9 is considered normal. Below 18.5 is underweight, 25–29.9 is overweight, and 30 or above is obese.
▸Is BMI accurate for everyone?
BMI is a useful screening measure but does not directly measure body fat. It can be less accurate for athletes with high muscle mass, pregnant women, and some age groups. Use it as a general guide.
▸How is BMI calculated?
BMI equals weight in kilograms divided by height in meters squared. With imperial units it is 703 × weight (lb) ÷ height (in) squared.