Frequently Asked Questions
How accurate is this stopwatch? ▼
This stopwatch uses performance.now(), which provides sub-millisecond precision and is not affected by system clock changes. The display updates every 50ms for smooth visual output. Actual timing accuracy is typically within a few milliseconds.
What is a "lap" vs a "split"? ▼
A split (or lap) time shows the time for just that individual lap — from the last lap press to the current one. The total time shows how much time has elapsed since the stopwatch started. This tool shows both.
Will it keep running if I switch tabs? ▼
Yes! The timer records the start timestamp, so even if the browser throttles the interval while the tab is in the background, the elapsed time will be accurate when you return to the tab.
Can I use keyboard shortcuts? ▼
Yes — press Space to start or pause, L to record a lap (while running), and R to reset (when paused). Keyboard shortcuts make timing competitions much easier.