Online Stopwatch & Timer
A free online stopwatch with laps, a countdown timer with an alarm, and a Pomodoro focus timer.
About the Online Stopwatch & Timer
The stopwatch measures to a tenth of a second using your device's high-resolution clock, and records laps with the fastest and slowest highlighted. The countdown timer beeps when time is up, and the time shows in the browser tab so you can switch away.
The Pomodoro technique, devised by Francesco Cirillo, alternates 25 minutes of focused work with 5-minute breaks, and a longer 15–30 minute break after four rounds.
The formula
Elapsed = now − start (paused time excluded)
Worked example
Timing three laps of a track
- Lap 1 ends at 1:32.4, lap 2 at 3:07.9, lap 3 at 4:41.0
- Lap times: 1:32.4, 1:35.5 and 1:33.1
- Fastest lap: lap 1; total 4:41.0
Questions people ask
Does it keep running in another tab?
Yes; browsers may slow updates in background tabs, but the time stays accurate because it's measured from the start time.
Will the alarm sound if my device is muted?
No, check your volume.