Running Pace Calculator

Pace is simply total time divided by distance, and average speed is distance divided by time (scaled to a per-hour rate): pace = time ÷ distance, speed = distance ÷ (time ÷ 3600 seconds). Both come out in whatever distance unit you entered — kilometers or miles — since this is a plain ratio, not a formula with unit-specific constants.

Switching the Metric/Imperial toggle relabels and rescales the distance field (e.g. 5 km becomes ≈3.1 mi) so the same real-world run is preserved; the pace and speed results simply follow whichever unit the distance is now in.