BMI Calculator
Calculate Body Mass Index with health category
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BMI
Underweight
< 18.5
Normal
18.5 - 24.9
Overweight
25 - 29.9
Obese
30+
How to Use BMI Calculator
- Enter your height (feet/inches or centimeters)
- Enter your weight (pounds or kilograms)
- Toggle between metric and imperial units
- See your BMI and health category
About BMI Calculator
Calculate your Body Mass Index (BMI) from height and weight. Supports both metric and imperial units. Shows your BMI category (underweight, normal, overweight, obese) based on WHO guidelines.
Frequently Asked Questions
What is BMI?
Body Mass Index is a measure of body fat based on height and weight. It's calculated as weight(kg) / height(m)².
Is BMI accurate for everyone?
BMI is a general indicator. It may not be accurate for athletes, elderly, or those with unusual muscle mass.
What are the BMI categories?
Under 18.5 is underweight, 18.5-24.9 is normal, 25-29.9 is overweight, 30+ is obese.
Should I use metric or imperial?
Use whichever you're comfortable with. The tool converts automatically for the calculation.