EN

Online stopwatch

Start, stop and record laps, accurate to a hundredth of a second. Your time is saved if you close or reload the page.

00:00.00

Press Lap to record split times.

Space Start/Stop · L Lap · R Reset · F Full screen

The stopwatch measures elapsed time from a high-resolution clock, so it doesn't drift the way a counter does. It keeps counting while the tab is in the background, and if you close the browser it picks up exactly where it was when you come back.

Press Lap to record split times. Each lap shows its own time and the running total, with the fastest and slowest laps highlighted. Copy the full table to paste into a spreadsheet or a message.

Full screen mode turns the display into a large, clear readout for races, training sessions and presentations.

How to use it

  1. Press Start (or the Space bar) to begin timing.
  2. Press Lap (or L) to record a split while it keeps running.
  3. Press Stop to pause, then Reset to clear.

Frequently asked questions

How accurate is this stopwatch?
It reads a high-resolution clock, so the measured time is accurate to well under a hundredth of a second. Your reaction time when pressing the button matters far more.
Does it keep running if I close the tab?
Yes. The start time is saved in your browser, so reopening the page shows the correct elapsed time and your laps.
What is the difference between lap time and total?
Lap time is how long that one lap took. Total is the time from the start up to the end of that lap.
Are there keyboard shortcuts?
Space starts and stops, L records a lap, R resets and F toggles full screen.

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