Stopwatch
Measure elapsed time, pause and resume, and record lap and total times.
Your inputs
Your result
Ready
00:00:00.00
| Lap | Lap time | Total time |
|---|
How it works
- Start measures elapsed time from a monotonic clock. Pause freezes the total; each lap records both its interval and the accumulated time.
Assumptions and limitations
Time comes from your device, not a synchronized time server. Keep this page open and the device awake for alarms and timers. Background tabs may delay sound. Nothing is saved after leaving this page.
Sources
- MDN — browser timers and background throttling Sources reviewed: 2026-10-24
