Stopwatch
Measure elapsed time with a display in hundredths of a second, lap recording and keyboard shortcuts.
About the Stopwatch
Our free online stopwatch measures elapsed time to the hundredth of a second with start, stop, and reset controls, plus lap times for tracking multiple intervals. Just open the page and press start, with no download or signup needed, to time workouts, study and work sessions, cooking, presentations, races, experiments, and anything else where you need accurate timing. The lap feature lets you record split times without stopping the clock, which is ideal for tracking repeated efforts. The large, clear display is easy to read from across the room. Because it runs entirely in your browser, the stopwatch keeps counting while you work, and nothing about your timing is sent to a server. It is free, instant, and always ready whenever you need to time something.
Features
- Precise elapsed time to hundredths of a second
- Start, Stop, and Reset controls
- Lap durations and differences from the preceding lap
- Large, easy-to-read display
- Keyboard shortcuts (Space for Start/Stop, R for Reset)
- 100% free — no signup required
How to use this tool
The Stopwatch works right in your browser — no signup, no installation. Follow these steps:
- Click Start to begin timing.
- Click Lap to record a split time without stopping.
- Click Stop to pause the stopwatch.
- Click Reset to clear all times and laps.
Frequently asked questions
How precise is this stopwatch?
The display shows hundredths of a second and updates approximately every 20 milliseconds. Elapsed time uses your device clock; browser scheduling and clock changes can affect timing. Display resolution is not a guarantee of measurement accuracy.
Can I use keyboard shortcuts?
Yes. Press Space to Start/Stop, R to Reset, and L to record a Lap.
Does it work on mobile?
Yes. The stopwatch is fully responsive and works on all devices with tap-based controls instead of click.
Using the results
The Stopwatch gives you exact dates and durations without manual counting. It calculates instantly in your browser, accounts for the cases people actually need, and keeps whatever you enter on your own device.