Running Split Calculator

Your details

Controls whether distances are entered and displayed in kilometres or miles.
Choose a standard race preset or enter a custom distance below.
Your goal finish time in h:mm:ss or mm:ss format (e.g. 50:00 or 1:45:00).
How frequently to show a split. Common choices: every km, every mile, or every 400 m on a track.
Even splits: every lap at the same pace. Negative split: the final segment runs faster, which research shows improves race performance.
Pace per kmIntermediate pace
5:00 /km

Your average pace per kilometre

Pace per mile8:03 /mi
Speed12km/h
Speed (mph)7.46mph
Race distance10km
Finish time (sec)3,000s
Full split count10
Lap time (base pace)5:00
Final segment distance0km
Speed (km/h)12
Speed (mph)7.46

Target pace: 5:00 /km

  • Your average pace is 5:00 /km (8:03 /mi).
  • Running even splits means every one of your 10 laps targets 5:00.
  • Even pacing is the most efficient strategy for most runners: starting too fast leads to glycogen depletion and a dramatic slowdown late in the race.
  • Your average speed is 12.00 km/h (7.46 mph).

Next stepPrint or screenshot your split table before race day so you can check your splits at each marker without doing mental arithmetic on the course.

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