How to use the stopwatch
- Press Start, or the space bar.
- Press Lap, or L, at the end of each lap.
- Pause, then copy the laps or press Reset.
Examples
Three laps of a 400 m track, with laps taken at 1:02.50, 2:01.00 and 3:05.25: the lap times are 1:02.50, 0:58.50 (quickest) and 1:04.25 (slowest).
Copy laps gives tab-separated text. Pasted into Excel or Google Sheets, it fills three columns: Lap, Lap time and Total.
A 5 km run with a stop at a signal: pause at 10:00.00 for 2 minutes, then resume. The stopwatch carries on from 10:00.00 and leaves out the 2 minutes you stood still.
About this tool
Time anything from a 100 metre sprint to a long meeting. Press Start or the space bar, and press L to record a lap. Each lap shows its own time and the total so far, with the quickest and slowest laps marked. The time comes from the device clock rather than from counting ticks, so it stays exact over hours, and a reload doesn't lose it.
Common questions
What's the difference between lap time and total?
Lap time is how long that one lap took. Total, also called the split time, is the time from the start to the end of that lap.
Is it accurate over a long time?
Yes. It notes when you pressed Start and takes that from the current time, so it can't drift the way a counter of ticks does, even after hours or in a background tab.
Which keys can I use?
Space starts and pauses, L records a lap, and R resets when it's paused. The keys are ignored while you're typing in a box.
Does it keep running if I close the tab?
The start time is saved in this browser, so when you open the page again it shows the right time, as if it had kept running.
Is it free to use?
Yes. There's no sign-up, and you can use it as often as you like.
Is my text uploaded anywhere?
No. This tool runs inside your browser, so what you enter stays on your device.
Do I need to install anything?
No. It works in your browser on a computer or a phone.