Fitness Calculators
3 free fitness calculators. Every tool is free, private and works on any device.
Heart Rate Calculator
Calculate your maximum heart rate by age and your target training zones for fat burning, aerobic and peak effort.
VO2 Max Calculator
Estimate your VO2 max from the Cooper 12-minute run test or a resting heart rate, and see how your aerobic fitness compares by age.
One Rep Max Calculator
Calculate your one rep max (1RM) from a set you've already lifted, with a full percentage table for training loads.