Enter your total distance, finish time (hours, minutes, seconds), and split distance to get a complete split time table for your run, ride, or swim. Choose from preset race distances like 5K, 10K, half marathon, or marathon, or enter a custom distance. Your split table shows each lap number, cumulative distance, and cumulative time — perfect for race planning and training.
Pace per km
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Total Finish Time
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Time per Split
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Number of Splits
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Average Speed
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A split time is the time it takes to complete a specific segment or interval of a race or training run. For example, a 1 km split tells you how long each kilometre took. Splits help athletes monitor their pacing and identify where they sped up or slowed down during a race.
Even splits mean running each segment of a race at the same pace. Research and race results consistently show that running even splits — or a very slight negative split (second half faster) — leads to better finishing times and less fatigue. Going out too fast in the first half usually results in a significant slowdown later.
A negative split means the second half of your race is faster than the first half. Many elite runners and coaches recommend negative splitting as a pacing strategy because it conserves energy early and allows you to finish strong. This calculator helps you plan even splits as a baseline for that strategy.
Select 'Marathon' from the distance dropdown, enter your goal finish time in hours, minutes, and seconds, then choose your preferred split interval (e.g. 1 km or 1 mile). The calculator will generate a full table showing the time you should hit at each split point to finish in your target time.
Yes. While the calculator is optimised for running distances, the underlying math works for any continuous endurance activity. Simply enter your total distance and goal time, choose an appropriate split interval (e.g. 400 m for pool swimming), and the table will show your target split times.
Pace is the time taken per unit of distance (e.g. 5:00 per km), while a split time is the elapsed time at a specific checkpoint in a race. Pace is consistent across the whole race when running evenly, but split times accumulate — your split at km 5 includes all the time from the start to that point.
For a 5K, most runners track 1 km splits, giving you 5 checkpoints to monitor your effort. Some prefer 400 m splits (approximately 12-13 splits for 5K), which gives a more granular view of pacing — useful on a track. Choose whichever interval matches how you plan to monitor yourself on race day.
Absolutely. Select 'Custom Distance' from the distance dropdown, enter your distance, and choose your unit (km or miles). You can also set a custom split interval to match course aid station positions or lap distances, making this useful for ultra-marathons, triathlons, and open-water swim events.