BMI Calculator

Calculate your Body Mass Index (BMI) using metric or imperial units. Get your BMI number, category, and a healthy weight range for your height.

Units:
Values auto-convert when switching units.
Results
Your BMI
Normal weight
24.22
Healthy weight range
53.5-72.0 kg (118-159 lb)
Shown in both units to avoid confusion.

Note: BMI is a rough screening tool. It can misclassify very muscular people or people with low muscle mass.

Fun facts
  • BMI was invented in the 1830s to study populations—it's not perfect for individuals.
  • Two people can share the same BMI but have very different body composition.
  • BMI doesn’t show fat distribution—waist size can matter a lot for risk.
  • Athletes can show “overweight” BMI despite being extremely fit.
  • BMI uses height squared, so small height changes can shift results more than expected.