Running Pace Calculator — min/km, min/mile & Finish Times
Enter a distance and time to get your pace per km and per mile, speed, and predicted 5K, 10K, half and full marathon finish times. Free, in your browser.
Predicted finish times
- 5K25:00
- 10K50:00
- Half1:45:29
- Marathon3:30:59
🔒 Calculated in your browser — nothing is uploaded.
Find your running pace
Enter the distance you ran (in km or miles) and the time it took, and see your pace per kilometre and per mile plus your speed in km/h and mph. Use the race buttons to drop in a 5K, 10K, half or full marathon distance instantly.
Predicted finish times
From your current pace, the tool projects finish times for the standard race distances — a quick way to answer "what marathon time is this pace?". Predictions assume you hold the same pace throughout. Everything is calculated locally in your browser.
Frequently asked questions
How is running pace calculated?
Pace = time ÷ distance. Ten kilometres in 50 minutes is a pace of 5:00 per km (about 8:03 per mile).
Are the marathon predictions accurate?
They assume an even pace for the whole distance. Real races usually slow over longer distances, so treat longer predictions as an optimistic estimate.
Can I switch between km and miles?
Yes. Pick the distance unit you entered; pace is always shown per km and per mile side by side.