Stopwatch
Time anything to the hundredth of a second, record laps, and keep running even if the page reloads.
- Your data never leaves your device
- 100% free
- No sign-up
- Works offline after first load
How to use the online stopwatch
- Press Start (or Space).
- Press Lap (L) for split times; Stop to pause and Resume to continue.
- Copy or download the laps; Reset (R) to start over.
About Stopwatch
A precise online stopwatch with lap and split times. It works in your browser, so it is instant and private.
Everything you set is remembered on your device, and the result can be copied, shared or printed. The page works offline after the first visit.
Good for
- Workouts, running and swimming laps
- Timing presentations and speeches
- Experiments, cooking and games
Tip: Press F for a full-screen display that is easy to read from across the room.
Frequently asked questions
How accurate is the stopwatch?
It measures from your computer’s clock, so it stays exact to the hundredth of a second even if the tab is in the background or the screen is busy.
How do I record laps?
Press Lap or the L key while it runs. Each lap shows its own time and the total; the fastest and slowest are highlighted, with the average lap.
What are the keyboard shortcuts?
Space starts and stops, L records a lap, R resets and F switches to full screen.
Will it stop if I close or reload the page?
No — the start time is saved, so it carries on counting when you come back.
Can I save the lap times?
Yes — copy them or download a CSV file for a spreadsheet.