Online Stopwatch
Measure to a hundredth of a second, with lap splits.
00:00.00
Free — no install, no sign-up
How to use
- Hit Start to begin timing.
- Hit Lap whenever you want a split — each lap records its own time and the running total.
- Pause and Resume as needed; Reset starts over.
Frequently asked questions
How precise is it?+
The display shows hundredths of a second, and the underlying measurement is anchored to the real clock, so precision doesn't depend on the refresh rate. Plenty for sports, experiments and time tracking.
What are laps?+
Split times recorded without stopping the watch — per running lap, per exam question, per work task. Each entry stores the split duration (+) and the cumulative time at that moment.
Is it accurate in a background tab?+
Yes. The countdown is anchored to the wall-clock end time rather than accumulated ticks, so browser tab throttling never makes it drift.
Is it really free?+
Yes. No sign-up, no install, no usage limits. The site is ad-supported.
Guide
Where it comes in handy
Interval training and lap splits, timing practice questions, measuring steps of a recipe or experiment, and per-task time tracking at work — one browser tab and you're timing, no phone needed.