Kalkuly
EN
Online stopwatch
A simple, accurate stopwatch with lap times. Ideal for sport, cooking, games, presentations or timing an exam.
00:00.00
How to use it
Click Start to begin, Lap to record an intermediate time, Stop to pause and Reset to start over. The space bar also starts and stops it.
Formula and method
Elapsed time = current time − start time (minus pauses), measured with the browser’s high-precision clock and displayed to the hundredth of a second.
Worked example
For interval training, press Lap at the end of each 400 m: the list shows each lap time so you can compare your pace.
Frequently asked questions
Does the stopwatch keep running in another tab?
Yes. Time is calculated from the start moment, so it stays accurate even if the tab is in the background.
Can I use the keyboard?
Yes: press the space bar to start or stop the stopwatch.
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