Tools
Fitness calculators
Three quick numbers about your body and your fitness, with the formula behind each one.
BMI calculator
Your body mass index, its WHO category and the weight range that counts as normal for your height.Muscle potential calculator
How much muscle you can build without drugs: your fat-free mass index and three published estimates of the ceiling.Cooper test calculator
Run as far as you can in 12 minutes. Your distance gives your VO₂max and how you compare with others of your age and sex.