Free fitness calculators

Typed, server-rendered calculators. Every number on these pages comes from one content-addressed function.

• BMI calculator

  Get your Body Mass Index and weight category from your height and weight. Free, instant, no sign-up.

• Asian BMI calculator

  BMI with the WHO Asian-population cutoffs — overweight starts at 23, obesity at 27.5 — because cardiometabolic risk rises at lower BMI in Asian populations.

• FFMI calculator

  Fat-free mass index is a BMI-like number that accounts for muscle. Enter your weight, height and body fat to see where you sit.