Stopwatch
Free online stopwatch with lap times, lap stats, and CSV export
Press Space to start/stop, L to lap, R to reset
About the Stopwatch
A simple, accurate online stopwatch for timing anything. Track lap times with best, worst, and average lap statistics, export your laps to CSV, pause and resume, and reset when you're done. Works on desktop and mobile browsers.
Accuracy method: elapsed time is calculated from absolute epoch timestamps rather than counting interval callbacks. That lets the display recover after tab throttling or device sleep; the 10 ms refresh rate affects visual smoothness, not the measured result.
Common Uses
- Timing workouts and exercises
- Tracking lap times for running or swimming
- Timing cooking or baking
- Measuring task duration
- Board game turn timing
Keyboard Shortcuts
- SpaceStart / Stop / Resume
- LRecord lap time
- RReset stopwatch
Frequently Asked Questions
How do I use the online stopwatch?▾
Press Start to begin timing, Lap to record split times, and Stop to pause. Press Reset to clear the stopwatch and start over. You can also use keyboard shortcuts for faster control.
Can I record lap times?▾
Yes. Tap Lap while the stopwatch runs to capture a split without stopping the clock. Each lap is listed so you can compare times across intervals.
Can I see lap statistics or export my lap times?▾
Yes. With two or more laps, the stopwatch shows your best, worst, and average lap times above the lap list, highlighting the best and worst laps. Use the Export CSV button below the lap list to download your laps as a CSV file with lap numbers, split times, and total times.
Does the stopwatch keep running if I switch tabs?▾
Yes. The stopwatch keeps timing accurately in the background even if you switch tabs or minimize the browser, because it tracks elapsed real time.
Is the online stopwatch free?▾
Yes, the stopwatch is completely free with no signup, no downloads, and no ads. It works on desktop, tablet, and mobile browsers.