Track Lap Time Calculator
Find how long one lap takes at a steady speed, and how long a set of laps will take. Track lengths vary, so enter the length of the lane you run.
- Free
- Works offline after your first visit
- Saves on this device
- No sign-up
- Updated
How it works
Lap time is the lap length divided by your speed. The calculator converts yards or meters and miles or kilometers per hour, so you can use whichever units you know.
A standard outdoor track is 400 meters around the inside lane. Running a wider lane adds distance, so check the length of the lane you actually use.
Worked example
At 10 mph, one 437 yd lap takes 1 min 29 s, so 10 laps take 14 min 54 s.
Questions
Is every lap 400 meters?
No. Track lengths differ, and outer lanes are longer than the inside one. Use the length of the lane you run.
Does my speed stay the same over the whole set?
The calculator assumes an even pace. Most people start fast and slow down, so the real total is often longer.
Why does my watch show a different lap time?
A watch with GPS can be a few percent off on a track. Compare over several laps, not a single one.
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