How to use the online stopwatch
- Press Start to begin timing.
- Press Lap while running to record splits. With 3 or more laps, the fastest is shown in green and the slowest in red.
- Press Stop, then Resume to continue or Reset to start over.
Great for
- Workouts and runningTap Lap each round to compare your splits.
- Study sessionsMeasure how long you really focused and copy the results.
- Presentation practiceTap Lap on each slide to see how long each part takes.
- Cooking and experimentsGo full screen to read it from across the room.
Keyboard shortcuts
| Space | Start / Stop |
| L | Record lap |
| R | Reset (when stopped) |
| F | Toggle full screen |
Frequently asked questions
Can I switch to another tab while it runs?
Yes. Elapsed time is calculated from the start time, so it stays accurate even if you switch tabs or refresh the page.
How do I save my lap times?
Press 'Copy laps' below the lap list to copy the lap number, lap time and total time as a table you can paste into a spreadsheet or notes app.
How accurate is it?
It displays hundredths of a second and is calculated from the system clock, so errors don't build up even over long sessions.