Precise stopwatch with lap timer — free, instant, no signup required.
Click Start to begin timing. The display updates in real time showing minutes, seconds, and hundredths of a second.
Click Lap while running to record split times. Each lap is listed below the timer with its individual and cumulative time.
Click Reset to clear the timer and all laps. You can pause and resume without losing your time.
It uses the browser's high-resolution timer and updates every 10ms, giving hundredths-of-a-second precision — accurate enough for most timing needs.
Yes. The timer continues running even if you switch tabs. The elapsed time is calculated from the start timestamp, not from frame updates.
Unlimited. All laps are listed in the scrollable panel below the buttons.
A stopwatch measures elapsed time counting up from zero — press Start, and it tracks hours, minutes, seconds and hundredths until you press Stop. This one runs entirely in your browser: nothing to install, no signup, and it keeps counting accurately even if you switch tabs, because it measures real clock time rather than counting screen refreshes.
Use the Lap button to record split times without interrupting the count — handy for interval training, timing laps in sports, tracking how long each step of a task takes, or timing multiple attempts in a row. Reset clears everything for a fresh start.
People mix these up constantly. A stopwatch counts up from 0:00 and answers "how long did this take?" A timer counts down from a value you set and answers "tell me when the time is up." If you want an alarm after a fixed period — say 25 minutes of focused work — use our countdown timer or the Pomodoro timer instead.
It reads your device's system clock, so displayed time stays accurate to within a few hundredths of a second — even when the tab is in the background.
No. Closing the tab ends the session. Keep the tab open (it can be in the background) while timing something important.
No — the stopwatch runs 100% locally in your browser. Nothing you time is sent anywhere.