Online Stopwatch – Precise Timer with Lap Splits
A free, browser-based stopwatch with millisecond precision, lap recording, and split times — ready to use instantly with no setup.
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Lap Times
Results
What is this tool?
An online stopwatch is a browser-based precision timing tool that measures elapsed time down to the millisecond. Unlike a physical stopwatch, it runs entirely in your browser with no app or download required. It is designed for athletes tracking race splits, students managing study blocks, cooks timing recipes, and anyone who needs accurate, instant time measurement. The lap feature lets you record multiple split times without ever stopping the clock.
How to use this tool?
1. Open the Online Stopwatch page — the timer is ready immediately at zero.
2. Click "Start" to begin timing; the display updates every millisecond.
3. Click "Lap" at any checkpoint to log a split time without stopping the stopwatch — laps appear in a list below.
4. Click "Stop" (or "Pause") to freeze the timer when you are done or need to pause.
5. Click "Start" again to resume from where you paused.
6. Click "Reset" to clear all times and return the display to zero, ready for the next session.