Online stopwatch
Time something to the hundredth of a second, with laps.
- Runs in your browser — nothing you enter is uploaded
- No sign-up, no quotas, free to use as often as you like
How it works
A stopwatch measures how long something took: a run, a drill, a process at work, a child's swimming length. What matters is that it does not quietly lose time and that lap splits are easy to read afterwards.
Accurate regardless of the tab
Elapsed time is calculated from timestamps taken from your device's clock rather than accumulated in a counter. Browsers throttle background tabs, which makes counter-based stopwatches drift badly; this one does not, because the answer is recomputed rather than accumulated.
Laps and splits
Each lap records both the split — the time since the previous lap — and the total elapsed time at that point. The most recent lap appears at the top, which is where you look while timing.
Display
Hundredths of a second are shown. That is the honest resolution for a browser-based stopwatch: the timing source is precise, but human reaction time when pressing the button is tens of milliseconds, so finer precision would be false confidence.
Nothing is stored
Laps live in the page and disappear when you close it. There is no account and nothing is uploaded. Copy anything you need to keep before you leave.
Online stopwatch — questions
Does it keep running if I switch tabs?
Yes, and it stays accurate, because elapsed time is measured against your device's clock rather than counted.
How precise is it?
It displays hundredths of a second. Your reaction time pressing the button is the real limit on accuracy, not the clock.
Are my lap times saved?
No. They exist in the page only and are lost when you close it.
Do I need an account?
No, and nothing is uploaded.