Online stopwatch
Time anything to the hundredth of a second, with laps, in any browser.
- 100% free
- No sign-up
- Runs in your browser
00:00.00
Next: Online timer · Pomodoro timer · Online alarm clock
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How to use Online stopwatch
Press Start
Click Start or press the Space bar. The time counts up in minutes, seconds and hundredths, and hours once you pass 60 minutes.
Record laps
Click Lap or press L at the end of each lap. Each row shows the lap time and the total so far, with the fastest and slowest lap marked.
Stop and copy
Press Space to stop and again to carry on. Copy the laps as a table for a spreadsheet, or press R to reset.
Why use Utils365
Accurate in the background
The time comes from your computer’s clock, not from counting ticks, so it stays right in a background tab or a busy browser.
Laps with splits
Every lap shows its own time and the running total. The fastest lap is marked in green and the slowest in red.
Full screen
Show huge digits across the whole screen for a classroom, a gym or a presentation.
Keyboard friendly
Space starts and stops, L records a lap and R resets, so you can keep your eyes on what you’re timing.
Frequently asked questions
How accurate is an online stopwatch?
It reads your computer’s high-resolution clock, so it’s accurate to well under a hundredth of a second. What limits it is your reaction time when clicking, typically 0.15 to 0.25 seconds.
Does it keep running if I switch tabs?
Yes. The elapsed time is worked out from when you pressed Start, so it’s correct when you come back, even after an hour in another tab.
What’s the difference between lap time and split time?
A lap time is how long that one lap took; the split is the total time since the start. Laps of 62, 65 and 60 seconds give splits of 1:02, 2:07 and 3:07.
How do I copy my lap times?
Click Copy laps above the lap table. Each lap is copied on its own line with the lap time and total, separated by tabs, so it pastes neatly into Excel or Google Sheets.
Can I use the keyboard?
Yes. Space starts and stops, L records a lap and R resets. The keys work when you’re not typing in a field.
How long can it run?
As long as the tab stays open. It shows hours once you pass 60 minutes and keeps counting past 100 hours. Closing the tab or the browser loses the time.