FREE RUNNING TOOLS
Race splits calculator
Break your target time into readable splits. Include the finish, even when the last kilometer or mile is incomplete.
Calculations happen in your browser. Your inputs are not uploaded or added to the URL.
Example result
10 km in 50:00
| Split (km) | Split time | Elapsed time |
|---|---|---|
| 1 | 5:00 | 5:00 |
| 2 | 5:00 | 10:00 |
| 3 | 5:00 | 15:00 |
| 4 | 5:00 | 20:00 |
| 5 | 5:00 | 25:00 |
| 6 | 5:00 | 30:00 |
| 7 | 5:00 | 35:00 |
| 8 | 5:00 | 40:00 |
| 9 | 5:00 | 45:00 |
| 10 | 5:00 | 50:00 |
How it works
Even pacing assigns the same time per unit of distance. In the negative-split option, the second half of the distance takes 2% less time than the first half. Both halves still add up to your target finish time.
Try this example
A 50-minute 10K at even pace has ten 5-minute kilometer splits. With the 2% negative-split option, the first 5K takes about 25:15 and the second about 24:45. This is an illustration of pacing, not a recommendation for every race.
Common questions
What does negative split mean here?
The second half of the distance takes less time than the first. The 2% setting refers to the difference between the two half times, not a 2% reduction from your average pace.
Why is the last split shorter?
A half marathon is 21.0975 km and a marathon is 42.195 km. The table includes the remaining distance so that the last elapsed time matches the requested finish time.
Can I print a pace band?
Use Print splits to open your browser’s print dialog. The print layout includes your chosen race, strategy and complete split table.