Stopwatch

How to use Stopwatch

1. 1Choose a mode. Pick Stopwatch to count up, or Timer to count down from a set time.
2. 2Start timing. Hit start - the display updates every few milliseconds.
3. 3Record laps. In stopwatch mode, press Lap to capture splits with per-lap deltas.
4. 4Reset when done. Stop and reset to clear the display and the lap list.

Stopwatch Features

• ✓Millisecond-precision display
• ✓Lap times with per-lap deltas
• ✓Countdown timer with sound alert
• ✓Keyboard shortcuts (space to start/stop)
• ✓Pause and resume without losing time
• ✓Works in a background tab

Stopwatch Frequently asked questions

How accurate is the stopwatch?

The display updates roughly every 10 milliseconds, and elapsed time is measured against the system clock, so pausing, switching tabs, or a busy browser does not skew the result. It is accurate enough for workouts, cooking and presentations, though not for certified sports timing.

What is the difference between lap and split times?

The lap list shows both: each lap's own duration and the total elapsed time when that lap ended. The delta tells you whether the latest lap was faster or slower than the one before it.

Does the timer sound an alarm?

Yes. When the countdown reaches zero, the tool plays a short beep and shows a 'time's up' banner. Keep the tab open and your volume up so you hear it.

Will it keep running if I switch tabs?

Yes. Time is calculated from the system clock rather than counting ticks, so switching tabs or minimizing the window does not affect accuracy.

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