Online Stopwatch

Free Online Stopwatch

This free online stopwatch measures elapsed time with precision down to hundredths of a second. Whether you're timing a sprint, a workout interval, a presentation, or a study session, the stopwatch starts instantly in your browser — no app, no download required. It works on any device, including phones and tablets.

Stopwatch with Lap Timer

Press Lap while the stopwatch is running to record split times. Each lap entry shows the lap number, the individual lap duration, and the cumulative total time. The best lap is highlighted in green and the worst in red, making it easy to compare performance across rounds. The stopwatch online lap timer is popular with athletes, coaches, and educators tracking multiple intervals.

Accurate Stopwatch Timer

This stopwatch timer records the exact start timestamp and computes elapsed time as the difference from that fixed point — rather than accumulating time through repeated intervals, which can drift. The result is an accurate stopwatch that stays reliable even when the browser tab is in the background or the screen is off.

Fullscreen Mode

Click Fullscreen to enter a distraction-free mode with large digits centered on screen. This web stopwatch fullscreen mode is ideal for classroom use, gym sessions, or any scenario where timing needs to be visible from a distance. Press Escape or the exit button to return to the normal view.

Related: Online Timer · Countdown Timer