Race Split Calculator
Find the split time for part of a race at even pace.
The point in the race you want the split time for.
Results update as you type.
How it works
This race split calculator tells you what time you should reach any point in a race if you run it at an even pace to your target finish. Enter the total distance, your goal total time, and the split distance you care about, and it returns the time you should hit that marker. It is the tool for building a pacing plan you can check against your watch on race day. Split times matter because racing to a goal is really about pacing discipline, and the surest way to blow a time goal is to start too fast. By knowing in advance what your watch should read at 5, 10, or 21 kilometres, you can rein yourself in early and catch any drift before it costs you the finish. Many runners write these splits on a wristband or program them into a watch so they always know whether they are on schedule. The calculation assumes even pacing, dividing your goal time proportionally across the distance, because a steady effort is usually the most efficient way to race and the easiest plan to follow. You can generate a whole set of checkpoints by running the calculator for each split distance you want. Whether you are targeting a marathon time or pacing a 10K, a race split calculator turns a single finish-time goal into a clear, checkable schedule for every stage of the race.
split time = total time ÷ total distance × split distance
At an even pace, the time to reach any point in a race is proportional to how far into the race that point sits. Dividing the total time by the total distance gives the pace, the time spent per unit distance, and multiplying that pace by the split distance gives the time you should pass that marker. This linear scaling assumes a constant effort, so each split lands exactly on schedule for the target finish.
Source:Standard sports science (even-pace splits)
We review all our tools from time to time to ensure accuracy.
Worked example
How to use this calculator
- 1
Enter your values
Enter total distance, total time and split distance.
- 2
Adjust the options
Fine-tune any options to match your situation.
- 3
Read your result
Split time updates instantly as you type — no button to press.
Frequently asked questions
Does this assume I run an even pace?
Yes. The split time is calculated by spreading your goal time evenly across the total distance, so each split reflects a constant pace throughout the race. Even pacing is generally the most efficient racing strategy and the simplest to follow, which is why it is the default here. If you plan a deliberate negative split, running the second half faster, treat these even-pace splits as an upper limit for the early checkpoints.
How do I build a full pacing schedule?
Run the calculator once for each checkpoint you want, keeping the same total distance and total time but changing the split distance. Enter 5, 10, 15, and 20 kilometres in turn to get the target time at each, and note them down. Writing these splits on a pacing band or loading them into your running watch gives you a checklist to confirm you are on schedule at every stage of the race.
Can I use this for a negative split plan?
The calculator produces even-pace splits, but you can adapt them for a negative split, where you run the second half faster. Aim to be slightly behind the even-pace time at halfway, then ahead by the finish. Use the even-pace splits as reference points and deliberately add a few seconds to the early ones, banking freshness to spend later. This approach reduces the risk of fading and often yields a stronger finish.
Why is the split time shown in minutes?
The result is a decimal number of minutes to keep entry and further calculation simple. Convert the fractional part to seconds by multiplying by sixty: a split of 62.5 minutes is one hour, two minutes, and thirty seconds. For race day you will usually want the split as a clock time, so convert it into hours, minutes, and seconds to match what your watch or the course clocks will display as you pass each marker.
Does the split distance have to be halfway?
No. You can enter any split distance up to the total, not just the halfway point. Common choices are every 5 kilometres, each 10-kilometre mark, or specific landmarks on the course. The formula scales the time proportionally to whatever split distance you enter, so you can plan checkpoints wherever they are useful, whether that matches the official timing mats or simply the spots where you plan to check your progress.