duration.tools

Running Pace Calculator

Pace, time, or distance — solve for any.

KmElapsed
15:15:00
210:30:00
315:45:00
421:00:00
526:15:00
631:30:00
736:45:00
842:00:00
947:15:00
1052:30:00
Pace per km
315:00
506:57 per mile
Per mile
506:57
Speed
0.19 km/h
Total time
52:30:00

Enter any two of distance, time, and pace, and the third is solved. Distance presets cover 5K through marathon, and the result includes even splits per kilometre or mile — the number to write on your arm before race day.

How to use it

  1. 1.Pick a distance preset or type your own.
  2. 2.Enter your time (or your target pace).
  3. 3.Read the pace both per km and per mile, plus split times.

Questions people ask

What pace is a 4-hour marathon?
5:41 per kilometre, or 9:09 per mile. Enter marathon + 4:00:00 and the splits table shows every checkpoint.
How do km and mile paces relate?
Multiply min/km by 1.609 to get min/mile. A 5:00/km runner is at 8:03/mile — the tool always shows both.