Track Lap Split Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserBasic
Enter details
Distance(m)
Goal time
::
Lap length(m)
Result
Fill in the fields to see your result.
Estimate only — real results depend on terrain, weather, fatigue, conditions and individual fitness. Not medical or coaching advice.
How to use this calculator
- Enter your target distance (m), goal time and lap length (default 400 m).
- Read how many laps you'll run and the time you need per lap.
How it works
Laps = distance ÷ lap length; time per lap = goal time ÷ laps. Hitting an even lap split is the simplest way to pace a track race.
Worked example
5000 m in 20:00. 12.5 laps of 400 m = 1:36 per lap.
Tips
- Times are estimates only — not medical or coaching advice. Always train safely and follow event rules.
- Distances are editable: choose “Custom…” to enter your own course lengths.
Frequently asked questions
Can I use a non-400 m track?
Yes — set the lap length to your track (e.g. 200 m indoor).
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.