Online Stopwatch
A precise free online stopwatch with start, pause, lap and reset — measure anything down to milliseconds, right in your browser.
This free online stopwatch gives you a clean, millisecond-accurate timer for workouts, study sessions, cooking, and experiments. Press Start to begin timing, record split times with the Lap button, and review every lap in the list below. Pause and resume whenever you like, or reset to start over. It runs entirely in your browser with no sign-up and no downloads.
Lap Times
| Lap | Lap Time | Total Time |
|---|
Press Start to begin timing.
How to use the Online Stopwatch
- Press the Start button to begin timing; the display counts up in minutes, seconds and hundredths of a second.
- Press Lap at any moment to record a split time without stopping the watch, and review all laps in the table below.
- Press Pause to stop temporarily and Resume to continue, or press Reset to clear the time and lap list.
Online Stopwatch — FAQs
Is this online stopwatch free to use?
Yes, the stopwatch is completely free with no sign-up, no time limits and no usage caps. You can start, pause and reset it as many times as you like, and record as many lap times as you need for your session.
Is my timing data sent to a server?
No. The stopwatch runs entirely in your browser using local JavaScript timing. Your lap times and elapsed time never leave your device, are never uploaded anywhere, and disappear when you close the page. There is no account, no tracking and no storage of any kind, so even sensitive sessions stay fully private.
How accurate is the stopwatch?
The display updates roughly every 50 milliseconds and shows hundredths of a second. For casual timing of sports, study sessions, cooking and experiments this is more than enough, though it is not certified for official competitions.
What is the difference between lap time and total time?
Lap time is the duration of the current split, measured since the previous lap button press, while total time is the elapsed time since you first pressed Start. The table shows both columns so you can compare each segment against the overall session.