Running Pace Calculator
Calculate running pace, finish time or distance — per km or per mile — with speed in km/h and mph and splits for the whole race.
For general information only — not medical advice. Results are estimates; talk to a doctor or qualified health professional about your own health.
How to use
- 1Pick what to solve for: pace, time or distance.
- 2Enter the other two values — times as h:mm:ss or mm:ss.
How it's calculated
Pace = time ÷ distance. Time = pace × distance. Speed = distance ÷ time. 1 mile = 1.609344 km.
Frequently asked questions
What pace is a 4-hour marathon?
About 5:41 per km or 9:09 per mile.
How do I convert min/km to min/mile?
Multiply by 1.609. A 5:00/km pace is 8:03 per mile.
Should I run even splits?
Even or slightly negative splits (second half faster) are usually the most efficient race strategy.