Online Stopwatch & Timer
Precise stopwatch with lap tracking and countdown timer. Runs entirely in your browser.
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What is the difference between a stopwatch and a timer?
A stopwatch counts up from zero to measure elapsed time, while a timer counts down from a set duration. This tool includes both functions: use the stopwatch to track how long something takes, or set a countdown timer for a specific duration.
How does lap tracking work?
Press the Lap button while the stopwatch is running to record the current elapsed time as a lap. Each lap shows the split time (total elapsed) and the lap time (time since the previous lap). You can record unlimited laps during a session.
How accurate is this online stopwatch?
The stopwatch uses your browser's high-resolution timer (performance.now) for millisecond-level accuracy. While it is extremely precise for everyday use, it is not suitable for official athletic timing which requires certified hardware.
Can I use keyboard shortcuts to control the stopwatch?
Yes, you can use the Space bar to start and stop the stopwatch, and the L key to record a lap. This makes it easy to control the stopwatch without moving your mouse.