Running calculators

Quick, accurate tools for pacing, race prediction, and training intensity. Free, no sign-up.

Running Pace Calculator
Free running pace calculator — enter a distance and time to get your pace per kilometre and mile, plus even-split times for every km.
Race Time Predictor
Predict your race time from a recent result using Riegel’s formula — see projected 5K, 10K, half marathon, and marathon times and paces.
Training Paces Calculator
Calculate your easy, marathon, threshold, interval, and repetition training paces from a recent race result.