Stopwatch
An online stopwatch measures elapsed time with millisecond precision directly in your browser, no app or installation needed. Start, pause, and reset the timer with a click, and record unlimited lap times to compare splits. It is ideal for workouts, races, cooking, studying, presentations, and any task you need to time.
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How to use the online stopwatch
- Press Start to begin timing.
- Press Lap to record split times without stopping the clock.
- Press Pause to stop timing, and Start again to resume.
- Press Reset to clear the timer and all recorded laps.
Frequently Asked Questions
How accurate is the stopwatch?
Our stopwatch is precise to the millisecond level. However, the actual accuracy depends on your device's clock and browser performance. For most casual timing needs, it provides more than sufficient precision.
What happens if I close my browser while the stopwatch is running?
The stopwatch state is not saved when you close your browser or refresh the page. If you need to time something over a long period or across sessions, consider using our countdown timer instead, which can be configured for upward counting.
How many lap times can I record?
There is no practical limit to the number of lap times you can record. However, for very large numbers of laps (hundreds or thousands), you might experience some performance slowdown depending on your device.
Can I export my lap times?
Currently, there isn't a built-in export function. However, you can manually copy the displayed lap times if you need to save or analyze them elsewhere.
Does the stopwatch continue to run if I switch to another tab?
Yes, the stopwatch continues to run even when you switch to another browser tab or window. However, some browsers might throttle JavaScript in background tabs, which could affect timing precision if left in the background for extended periods.
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