Stopwatch and timer
A stopwatch with laps and a countdown timer with an alarm.
Stopwatch
Ready
Keyboard: Space start or stop, L lap, R reset.
Laps
| Lap | Lap time | Total |
|---|
Countdown timer
5 minutes
Keyboard: Space start or pause, R reset. The timer keeps going in the background and if you refresh the page.
How to use it
- Stopwatch: press Start, then Lap to record splits. Stop and resume as often as you like; Reset clears it.
- Timer: switch to Timer, type hours, minutes and seconds or tap a quick time like 5 or 25 minutes, and press Start.
- When the timer ends it beeps, and the tab title says “Time’s up”. Use +1 min to add time, even after it has finished.
- Keyboard: Space starts and stops, L records a lap and R resets.
Questions
Does it keep running if I switch tabs or refresh?
Yes. Both work from the clock time they started at, not from a counter in the page, so switching tabs, locking your phone or refreshing doesn’t lose time. The countdown also shows in the tab title.
Why didn’t the timer make a sound?
Browsers only allow sound after you’ve clicked something on the page, so start the timer with a click or tap. Check that Play a sound is ticked and your device isn’t muted. If the timer finished while the page was closed, it shows “Time’s up” without a sound.
How accurate is the stopwatch?
It shows hundredths of a second and is accurate to a few milliseconds, which is far finer than the time it takes to press a button.
Can I copy my lap times?
Yes. Copy laps copies every lap as a table that pastes straight into Excel or Google Sheets.