Timer
00:00:00.00
Lap Times
0 LapsNo laps recorded yet.
Millisecond precision stopwatch with lap tracking.
No laps recorded yet.
An online stopwatch is a digital timekeeping utility that measures the amount of time elapsed from a particular time when activated to when the piece is deactivated. Unlike a standard clock, a stopwatch focuses on relative duration rather than the absolute time of day. This tool provides millisecond precision, making it suitable for high-accuracy tasks such as athletic timing, scientific experiments, or productivity tracking (like the Time Blocking method).
The Lap feature allows you to record specific points in time without stopping the main clock. This is essential for:
Our stopwatch uses the Date.now() method in JavaScript, which references the system's high-resolution hardware clock. This ensures that the time displayed remains accurate even if the browser's main thread is momentarily busy. By calculating the difference between the "Start" timestamp and the "Current" timestamp, the tool avoids the cumulative drift error often found in lower-quality timers that simply add milliseconds in a loop.
Timing sensitive experiments or personal routines requires absolute privacy. Many timer apps track your usage patterns or require a constant internet connection to function.
The Online Stopwatch is a 100% Client-Side application. Once the page is loaded, the timer logic runs entirely within your browser's local environment. No data regarding your sessions, lap times, or durations is ever sent to our servers. Because it uses standard web technologies, the timer remains stable and accurate even if your internet connection drops during a session.