Pace Calculator
Runs on your device. Nothing is sent.Nothing you type leaves your device - it's all worked out in your browser.
Calculate
Units
- Pace
- 5:00 per km
- Time
- 50:00
- Distance
- 10 km
- Speed
- 12 km/h
Finish times at this pace
| 1 mile | 8:03 |
| 5K | 25:00 |
| 10K | 50:00 |
| Half marathon | 1:45:29 |
| Marathon | 3:30:59 |
Splits
| Distance | Elapsed |
|---|---|
| 1 km | 5:00 |
| 2 km | 10:00 |
| 3 km | 15:00 |
| 4 km | 20:00 |
| 5 km | 25:00 |
| 6 km | 30:00 |
| 7 km | 35:00 |
| 8 km | 40:00 |
| 9 km | 45:00 |
| 10 km | 50:00 |
Work out your running pace, finish time or distance - per km or per mile - with race times from 5K to marathon and a split for every kilometre or mile.
Pick what you want to find - pace, finish time or distance - and type the other two. Enter times as 45:30 or 1:52:10 and paces as 5:15; switch between kilometres and miles at any time. Along with the answer you get your speed, the finish time for a mile, 5K, 10K, half marathon and marathon at that pace, and a split table showing where you should be at every kilometre or mile to run an even race.
Frequently asked questions
How is pace calculated?
Pace is time divided by distance. A 10K in 50:00 is 50 minutes ÷ 10 km = 5:00 per km. Speed is the inverse: 60 ÷ 5 = 12 km/h.
How do I convert pace per km to pace per mile?
Multiply by 1.609. 5:00/km is about 8:03/mile, and 8:00/mile is about 4:58/km. Switching the units on this page converts everything for you.
Why don't my race results match exactly?
The calculator assumes an even pace over the exact distance. Real races add hills, crowds, weaving and GPS drift, so your watch often shows a slightly longer distance than the official one.
Is anything saved?
Only your last inputs and units, on this device, so the page opens where you left it. Nothing is sent anywhere.