How to use the stopwatch
Click Start to begin. Click Stop to pause and save the current time as a lap. Click Reset to return to 00:00.0.
Time tools
Online Stopwatch
Start, stop, and record lap times in your browser.
Complete guide
How to use Online Stopwatch
The Online Stopwatch starts the moment you click Start and displays elapsed time to tenths of a second. Click Stop to pause and record a lap time. Click Reset to clear everything back to zero.
Lap times are recorded in the Laps field each time you press Stop, so you can track multiple intervals without losing previous readings.
Lap recording
Each time you press Stop, the current elapsed time is saved to the lap log. Continue with Start to keep running from where you stopped.
Accuracy
The stopwatch uses requestAnimationFrame for smooth display, with timing via Date.now() which is accurate to one millisecond.
Answers
Online Stopwatch FAQs
Does the stopwatch work offline?
Yes. Once the page is loaded, the stopwatch runs entirely in your browser with no internet connection required.
How do I record a lap?
Click Stop to pause and log the current time. Then click Start again to continue from the same point.
Is this stopwatch accurate?
It is accurate to the millisecond using browser timing APIs. Display updates every animation frame, typically 60 times per second.
Does the tab need to stay open?
Yes. If you switch tabs, the timer continues counting but the display may not update until you return.
Can I use this as a countdown timer?
The stopwatch only counts up. For countdowns, use the Countdown Timer tool.
Related tools