Stopwatch
Precise online stopwatch with lap times, millisecond accuracy, fullscreen mode, and keyboard shortcuts.
Embed This Tool
Add this tool to your website with customizable styling
How to Use
- 1 Start the timer by clicking the Start button or pressing Space on your keyboard. The stopwatch displays hours, minutes, seconds, and hundredths of a second.
- 2 Record lap times by clicking the Lap button or pressing L. Each lap shows both the lap time and total elapsed time.
- 3 Stop and reset the timer using the buttons or keyboard shortcuts. Space toggles Start/Stop and R resets everything.
- 4 Use fullscreen mode for a distraction-free view. The large display is perfect for timing events from a distance.
Frequently Asked Questions
How accurate is this stopwatch?
Our stopwatch uses high-precision browser timing (performance.now()) which provides sub-millisecond accuracy. It displays time in hours, minutes, seconds, and hundredths of a second (centiseconds) for precise measurements.
Does the stopwatch work if I switch tabs?
Yes! The stopwatch continues running accurately even when you switch to other browser tabs or minimize the window. It uses absolute timestamps to calculate elapsed time, ensuring no time drift occurs.
What are the keyboard shortcuts?
Space bar toggles Start/Stop, R resets the stopwatch, and L records a lap time. These shortcuts work when the page is focused and make it easy to control the timer hands-free.
Is my data saved?
Lap times are stored in memory during your session. When you reset or close the page, the data is cleared. No data is sent to any server - everything runs locally in your browser.
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