Race Split Calculator
Turn a goal into an even split table: enter a distance, a goal time or goal pace, and an interval, and get the cumulative time for every split point plus the time for each segment.
RunPaceKit — runpacekit.com
Even splits table — enter your distance, target and interval to see the plan.
Cumulative = time × distance / race distance; displayed cumulatives rounded to the second.
Your inputs
Your split plan
Enter a distance, a goal time or goal pace, and an interval to build your split table.
These results calculate a pacing scenario from your inputs. They do not predict your fitness or guarantee that a target is achievable.
How to read a split table
This tool assumes even pacing: the same speed for the whole race, so cumulative time grows in proportion to distance covered. Read the cumulative column for the watch time you want at each marker, and the segment column for how long each interval should take. Displayed segments are differences of rounded cumulative times, so they always sum exactly to your finish time even though the underlying math is never rounded. For a longer walkthrough with examples, read how to read race splits.
Worked example
A 5 km race in 25:00 with 1-mile intervals produces four rows. The first three cumulatives are 8:03, 16:06 and 24:08, and the finish row reads 25:00. The last segment covers only the remaining 171.968 meters after the third mile marker, so its segment time is 0:52. The 1-second difference between the third mile and the others comes from display rounding, not from a change in speed.
Frequently asked questions
What is a race split?
A split is the time recorded at a point along the race course. The cumulative column shows the clock time as you cross each split point; the segment column shows how long that piece of the race took on its own.
Why do my kilometer and mile splits differ by a second?
The table computes exact cumulative times internally and rounds them to the whole second for display; each segment is the difference of two rounded cumulatives. That keeps every segment summing exactly to your finish time, at the cost of an occasional 1-second wobble. See the full explainer.
What interval should I choose?
Choose whatever matches the markers you will actually see: kilometer or mile flags, or a lap distance for the track. The custom field accepts any interval in meters, and the finish line is always included as the last row.
Related guides
- Planning 5K splits — choose intervals and markers for your next 5K.
- Half marathon splits — kilometer and mile tables for 21.0975 km.
Next step: comparing pacing options? Open the negative split calculator →