Free Tools
Interactive calculators built for running for beginners. No sign-up, no downloads — enter your numbers and get an answer you can act on.
Running Pace Calculator
Turn a finish time and distance into your pace per mile and per kilometer, or flip it around to predict a finish time from a target pace.
Race Time Predictor
Enter one recent race result and get predicted times for a 5K, 10K, half marathon, and marathon using Riegel's formula.
Training Pace Calculator
Get your easy, tempo, and long run paces per mile from a recent 5K time, with a note on what each pace is for.