Click Start to begin timing from zero.
Click Pause to stop the timer, then Start again to resume from where you paused.
Click Lap to record a lap time without stopping the main timer.
Click Reset to clear all times and lap records and start fresh.
All calculations and data stay in your browser. Nothing is uploaded or stored.
Get instant, precise results with no waiting. Just input and calculate.
No registration, no fees, no daily limits. Use any tool as often as you need.
Fully responsive. Works on desktop, tablet, iPhone, and Android.
The stopwatch can measure up to 99 hours, 59 minutes, and 59.99 seconds before rolling over.
No. Lap times are stored in the browser's memory only. Refreshing or closing the tab resets everything.
It uses requestAnimationFrame for smooth updates and measures down to centiseconds (hundredths of a second).