Effort Calculator
Enter your best (100%) time and get target times for every effort level, from 50% up to 100% — built for tempo runs and controlled-effort reps.
Distance
sec
Target times
Effort scales inversely with time — target time = best time ÷ (percent effort ÷ 100). This is the standard way sprint coaches prescribe tempo work: a set percentage of an athlete's best effort for a given distance, rather than an arbitrary pace. Speed is shown for the currently selected distance and updates if you switch distances.