3 free tools
Sports & Performance calculators
Explore sports & performance tools with adjustable inputs, formulas, assumptions and worked examples. Choose a calculator below to see its method and limits.
Running Pace Calculator
Calculate pace, finish time, or required distance from any two running variables.
Open calculator →One Rep Max (1RM)
Estimate your maximum single-rep lift using the Epley formula.
Open calculator →Marathon Split Calculator
Plan even or negative splits for marathon and half marathon races.
Open calculator →