Side-by-side comparison helps you choose the right calculator for a specific clinical question.
Fitness
Calculate your estimated one-rep max using Epley, Brzycki, and Lander formulas. Determine your maximum strength from submaximal lifts. Pair with [Heart Rate Zones Calculator](/tools/heart-rate-zones) and [VO2 Max Estimator](/tools/vo2-max-calculator) for complete fitness profiling.
Formula
Epley: 1RM = weight × (1 + reps/30)
Inputs
Fitness
Calculate your personal heart rate training zones using the Karvonen method. Optimize your cardio training with zones based on age and resting heart rate. Estimate aerobic capacity with [VO2 Max Estimator](/tools/vo2-max-calculator).
Formula
Target HR = Resting HR + (Max HR − Resting HR) × intensity %
Inputs