Stopwatch
Stopwatch
Track elapsed time with lap splits, fullscreen mode, and export-ready logs.
InputsIdle0 lapsPaused
Keyboard: Space start/pause, L lap, R reset, F fullscreen.
Timer settings
Elapsed
00:00:00.000
Paused
Live
Stopped
0 laps
Formula
Elapsed and split times are derived from timestamp differences across lap checkpoints Symbol legend
| Symbol | Meaning | Unit | Copy |
|---|---|---|---|
t_{elapsed} | Elapsed time | hh:mm:ss.ms | |
t_{now} | Current timestamp | ms | |
t_{start} | Start timestamp | ms |
- Capture start timestamp when timer begins.
- Subtract start from current timestamp on each tick.
- Store lap checkpoints and compute split deltas for lap history and CSV export.
Example
Worked example: 2 laps
- 1 Start timer and run for 00:01:15.250, then capture Lap 1.
- 2 Continue to 00:02:40.900 and capture Lap 2.
- 3 Pause timer to keep final elapsed value.
Elapsed time and lap history are preserved in the panel.
How
- Press Start to begin timing.
- Use Lap/Split to capture intermediate times.
- Use keyboard shortcuts (Space, L, R, F), then export laps CSV or switch fullscreen when needed.
Avoid
- Closing the browser tab and expecting timer state to persist.
- Using stopwatch for long unattended durations without keeping the tab active.
- Confusing lap times with interval differences.
FAQ
Does stopwatch data leave my browser?
No. Stopwatch timing and lap records are processed locally in your browser.
Can I record multiple laps?
Yes, lap and split history is tracked and can be exported as CSV.
Are keyboard shortcuts available?
Yes. Space starts/pauses, L records lap, R resets, and F toggles fullscreen.
Switch
Switch12
No match.