Bodybuilding Calculators: FFMI, TDEE, Wilks, Half-Life
Free calculators for athletes and PED users: FFMI for natural muscle potential, TDEE for daily calories, Wilks for powerlifting comparison, and a steroid half-life calculator for ester planning.
FFMI Calculator
Estimate your natural muscle potential with the Fat-Free Mass Index
Wilks Score Calculator
Compare powerlifting strength across body weights and between male and female athletes
TDEE Calculator
Estimate your daily calorie needs based on BMR and activity level
Steroid Half-Life Calculator
Estimate the residual concentration of a steroid or testosterone ester after elimination
Track your cycles with real data
Daily journal, personalized curves, blood work, AI advice and 52 documented compounds. The full interactive version is available in the app.
Free 5-day trial — no credit card