Split Times Calculator
Build a cumulative split table for any distance and interval. Compare even pacing with a fade or negative-split strategy and see the required pace for every segment.
Result
—
Required pace
— / km
— / mile
| Split | Distance | Segment | Segment pace | Cumulative |
|---|
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How the split times calculator works
A split times calculator turns your total distance and finish time into a required pace, then lays out cumulative checkpoints at the interval you choose. It accepts kilometres, miles, or a mixed race-and-split setup.
Even pacing gives each segment the same pace. A negative split makes the second half faster by your chosen percentage; a positive split applies the same idea as a fade. The calculation solves the first-half pace so the displayed whole-second segments still add up to your target time.
If the interval does not divide evenly into the distance, the final row is a shorter partial segment rather than an ignored remainder.
pace per unit = total seconds ÷ distance in that unit; segment time = pace × segment distance Split times calculator FAQ
Can I use miles for a kilometre race?
Yes. Choose kilometres for the total distance and miles for the split interval, or reverse those choices. The calculator converts them using 1 mile = 1.609344 kilometres.
What happens when the interval does not divide the distance?
The final split is a partial segment containing the remaining distance, and its cumulative time is included in the target finish time.
What does the negative-split percentage mean?
It is how much faster the second half is than the first half. The calculator solves the two halves together so the total remains your target time.
Are the split times rounded?
The table uses whole seconds. Any rounding remainder is distributed across the segments so their total exactly matches the finish time.
Are my race details saved?
No. The calculation runs in your browser and the values you enter are not saved by this tool.