Running Splits Calculator

Calculate running pace, splits, and average speed. Track your performance for any distance.

Once you know how far you ran and how long it took, every other pacing figure follows directly from that ratio -- this calculator takes total distance and total finish time and derives your pace per kilometer, pace per mile, average speed, and a full kilometer- by-kilometer split table, all assuming an even, consistent pace throughout the run. Pace per kilometer is simply total time divided by total distance; pace per mile converts that using the standard kilometers-to-miles factor; average speed inverts the pace into a km/h figure that's often more intuitive for comparing across very different distances. The split table then projects that same even pace forward at each kilometer marker, so you can see your expected cumulative time at Km 1, Km 2, and so on through the finish -- the final row is capped at your actual entered distance rather than the next whole kilometer, so it always matches your real finish time. This is a "what pace did I average" tool, not a race-strategy planner -- it doesn't account for negative splits, positive splits, hills, or fatigue, so an actual race's real per-kilometer times will vary around the even pace shown here even when the average comes out the same. Runners commonly use a result like this after a race or workout to know their average pace for training-log purposes, or before a race to convert a personal-best time into a target per-kilometer split to chase.