Online stopwatch

Count up with big, clear digits and record lap times – ideal for PE, science experiments and quick-fire challenges.

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Keyboard: Space start/stop · L lap · R reset · F full screen.

Using the stopwatch in lessons

Press Start to begin counting and Lap to record a split without stopping – perfect for timing laps of the field, shuttle runs or each stage of an experiment. The fastest lap shows in green and the slowest in red once you have three or more.

More timers

⏱️Classroom timerBig countdown with presets for the board.🐢Fun timersAnimal race, sand timer, traffic light and candle.💪Interval timerWork and rest rounds for PE, HIIT and circuits.📝Exam timerReading time, extra time and 30/15/5 minute warnings.🍅Pomodoro timerFocus sessions with planned breaks.🔢Multiple timersA separate countdown for every group.🕒Classroom clockBig digital and analogue clock for the room.

Questions

How accurate is the stopwatch?

It shows hundredths of a second and is based on your device’s clock, so it stays accurate even if you switch tabs.

Can I record lap times?

Yes. Press Lap (or the L key) as often as you like. Each lap shows its own time and the running total.