Fitness & Body Calculators
Training numbers and body measurements, without the guesswork.
Peptide Calculator
Reconstitute any vial: mg, ml and syringe units worked out for you.
mg ÷ mlBench Press Calculator
Estimate your one-rep max from any set, two formulas side by side.
w × (1 + r/30)Strength Calculator
See how your lifts stack up against standards for your body weight.
1RM ÷ BWWalking Calorie Calculator
Calories burned walking, by distance, pace and body weight.
MET × kg × hArmy Body Fat Calculator
The official tape-test body fat estimate used by the US Army.
neck + waistAbout these calculators
These are the numbers that surround training and the body: mixing a vial to the right concentration, knowing your true one-rep max, seeing how your lifts compare with standards for your weight, what a long walk actually burned, and the tape-test body fat estimate the US Army uses.
Every tool here works from the standard formula for its job, and each page shows that formula with a worked example, so you can check the method as well as the answer. Treat the results as well-founded estimates for planning your training, not as medical advice; anything involving doses or your health deserves a professional's word as well.