Calculators tool
Use a Stopwatch
Measure elapsed time with start, pause, and reset controls.
Inputs
Results
Stopwatch
00:00:00
Ready
Simple steps
How it works
- 01
Start the stopwatch when timing begins.
- 02
Pause it to freeze the elapsed time.
- 03
Reset to zero for another measurement.
Good to know
Frequently asked questions
Does it run in a background tab?
Yes. Elapsed time is derived from the start timestamp when the page updates again.
Can I pause and resume?
Yes. Pause preserves the elapsed duration; Start resumes from it.
How precise is the display?
The display shows tenths of a second; browser scheduling can affect repaint timing.
Does reset keep the time?
No. Reset clears the elapsed time to zero.
Is timing data uploaded?
No. Stopwatch state remains on the page.