Running Pace Calculator

About this calculator

This calculator converts a distance and a finish time into your running pace per kilometer and your average speed in km/h, using the basic relationship between distance, time and speed. Beyond the raw pace figure, it projects that same pace onto standard race distances — 5K, 10K, half-marathon and marathon — so you can see what a training pace would translate to over a full race.

Runners use it both after a workout, to log how fast a given run actually was, and before a race, to plan a target pace that would produce a specific finish time. Coaches and running apps rely on the same math to build pacing strategies, since holding a steady pace per kilometer is usually more effective than running by feel alone, especially over longer distances where early over-pacing leads to a slower finish.