Online Stopwatch
Millisecond precision · Laps & splits · Best / worst laps · CSV export · Auto-saved
Shortcuts: Space start / pause · L lap · R reset (when stopped)
Lap Times
| Lap | Lap time | Total time |
|---|
No laps yet. Start the stopwatch and press Lap to record a split.
How It Works
A precise stopwatch for workouts, experiments, presentations and anything you need to time.
Start
Press Start or hit Space. Time runs with millisecond precision.
Record Laps
Press Lap to log a split. Each lap shows its own time and the running total.
Compare
The fastest lap is highlighted green and the slowest red, with the average shown above.
Export
Copy your laps or download them as a CSV file for a spreadsheet.
Frequently Asked Questions
Everything you need to know about the stopwatch.
How accurate is this stopwatch?
It measures elapsed time with your browser's high-resolution clock and shows milliseconds. Real-world accuracy depends on your device, and browsers may reduce timer precision slightly for privacy.
What is the difference between lap time and total time?
Lap time is the time since the previous lap button press. Total (split) time is the time since you started the stopwatch.
What happens if I close or reload the page?
Your session is saved in your browser. If the stopwatch was running, it keeps counting the real time that passed while the page was closed. Clicking Reset clears it.
Which keyboard shortcuts are available?
Press Space to start or pause, L to record a lap, and R to reset while the stopwatch is stopped.
Can I export my lap times?
Yes. Use Download CSV to save your laps as a spreadsheet file, or Copy laps to paste them as text.