Online stopwatch
Start, stop and record laps with a click or a key press, then copy or download your times.
| Lap | Lap time | Total |
|---|
Keys: Space start or stop, L lap, R reset
How to use it
- Click "Start" or press Space to begin timing.
- Click "Lap" or press L each time you want to record a lap.
- Click "Stop" or press Space again to stop the clock.
- Save your times with "Copy laps" or "Download CSV", then click "Reset" or press R to clear.
What it does
Lap list with totals
Every lap shows its own time and the running total, so you can compare splits at a glance.
Keyboard shortcuts
Space starts and stops, L records a lap and R resets, so your eyes can stay on whatever you're timing.
Full-screen view
Fill the screen with the clock for a race, a class experiment or a presentation.
Copy or export
Copy the lap list to paste into a message or spreadsheet, or download it as a CSV file.
Screen kept awake
On supported browsers the screen stays on while the stopwatch runs. Just keep the tab open.
Good to know
Laps make a stopwatch useful well beyond simple timing. Record each lap of a run or a swim, each question in a practice test, each step of a routine you want to speed up, or each speaker in a meeting. The lap time shows how long that segment took, and the total shows the time since you started.
Keyboard shortcuts save time: Space, L and R don't need a mouse, which helps when you're timing something that moves quickly. When you've finished, "Download CSV" saves a file that spreadsheet programs can open, so you can compare sessions over time.
Questions and answers
What are the stopwatch keyboard shortcuts?
Space starts and stops the stopwatch, L records a lap, and R resets it.
How do I save my lap times?
Click "Copy laps" to copy the list, or "Download CSV" to save it as a file you can open in a spreadsheet.
What's the difference between lap time and total?
Lap time is how long that single lap took. Total is the time from the start up to the end of that lap.
Do I need to keep the page open?
Yes, keep the tab open while you're timing. On supported browsers, the stopwatch also stops the screen from going to sleep while it runs.
Can I use the stopwatch on my phone?
Yes. It works in current versions of Chrome, Edge, Firefox and Safari on phones and computers, and full screen gives the clock the whole display.