Stopwatch & Timer

Is the stopwatch accurate?

Yes — the stopwatch uses Date.now() with updates every 10 milliseconds, providing centisecond accuracy suitable for everyday and sports use.

Can I record lap times?

Yes — in stopwatch mode, press "Lap" while running to record the current lap time while the main clock keeps going. Multiple consecutive laps can be recorded.

How does the countdown timer work?

Set the number of minutes and seconds then press "Start". The timer counts down to zero and plays an alert sound when it finishes.

Does it work offline?

Yes — the stopwatch and timer run entirely in the browser and need no internet connection.

Does the stopwatch work in the background?

The timer runs as long as the browser tab is open. Background tab throttling by the browser may cause slight delays on long-running timers.

Stopwatch & Timer — Productivity Techniques

A stopwatch measures elapsed time forward; a countdown timer counts down to zero. Both are essential for timed study sessions, interval training, cooking, and professional presentations. This tool runs entirely in your browser with no setup required.

The Pomodoro Technique

Set the timer to 25 minutes and work on a single task without interruption. When it rings, take a 5-minute break. After 4 cycles, take a longer 15-30 minute break. This rhythm reduces mental fatigue and improves sustained focus — popular among students and remote workers worldwide.

Using lap times for interval training

The lap button records split times without stopping the main clock. Use it to track individual lap times while monitoring total elapsed time — ideal for running intervals, swimming laps or any repeated-effort training protocol.