Running Pace Calculator

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Solve for pace, time or distance from the other two. Get pace per km and per mile, speed in km/h and mph for any run. Free and instant.

h m s
m s

Pick what to solve for, then fill in the other two fields.

Pace –
Pace per km –
Pace per mile –
Speed (km/h) –
Speed (mph) –
Assumes an even pace for the whole distance. Pace is shown as minutes and seconds per kilometre or mile. Splits will vary with terrain and effort.

About Running Pace Calculator

The running pace calculator solves for any one of pace, time or distance when you know the other two. Pick what to solve for, fill in the remaining fields, and it returns your pace per kilometer and per mile plus your speed in km/h and mph.

The math assumes an even pace across the whole distance: pace is total time divided by distance, and the tool converts freely between kilometers and miles so you can enter a 10K but read min/mile splits. Real splits will vary with terrain and effort.

Runners use it to set target splits before a race, work out what finish time a given pace produces, or check how far they can go in a fixed training window.

How to use Running Pace Calculator

  1. Choose what to solve for: pace, time or distance.
  2. Enter the distance in kilometers or miles.
  3. Enter the time in hours, minutes and seconds (or the pace, if solving for time or distance).
  4. Read the result — pace per km and per mile, plus speed in km/h and mph.

Frequently asked questions

Solve for pace with distance 42.195 km and time 4:00:00 — about 5:41 per kilometer, or roughly 9:09 per mile. The calculator shows both units side by side.

Enter your run in either unit and read both outputs — a mile is 1.609 km, so pace per mile is about 1.6 times the per-kilometer figure. A 5:00/km runner is at roughly 8:03/mile.

Pace is time per unit of distance (minutes per km or mile); speed is distance per unit of time (km/h or mph). They are reciprocals, and the calculator reports both for every run.

Yes — solve for time, enter the race distance and your sustainable pace, and read the projected finish. Remember the calculation assumes you hold that pace evenly the whole way.

The tool models a perfectly even pace. Hills, wind, crowding at the start and fatigue late in a race all push individual splits above or below the average it computes.
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