About this tool
Work out your running pace, finish time or distance from any two of the three, plus your speed in km/h and mph and pace per km and per mile. One-click race presets and everything computed live in your browser.
Frequently asked questions
How do I solve for a missing value?
Pick what to solve for at the top — pace, time or distance — then fill in the other two fields and the answer updates live.
What do the race presets do?
5K, 10K, half and full marathon set the distance for you, so you just enter your finish time to get the pace.