Stopwatch – From Pocket Watch to Browser Tool
The stopwatch has been a core timekeeping tool since the 18th century, when watchmakers first added a seconds hand that could be started and stopped independently. Today, this browser-based stopwatch offers the same precision digitally – with millisecond accuracy and unlimited lap recording.
Whether you are timing a workout, measuring a presentation, or tracking how long a task takes, this stopwatch is always just a browser tab away. No downloads, no sign-ups, no ads.
Features of This Stopwatch
Millisecond Precision
The stopwatch displays hours, minutes, seconds, and milliseconds. It uses your browser's high-resolution timer for maximum accuracy.
Lap Times with Split View
Record unlimited laps. Each entry shows both the individual lap duration and the cumulative total time, displayed in a sortable table.
Background Operation
Switch tabs or minimize the browser – the stopwatch continues running. When you return, the time is accurate. No data is lost.
Full-Screen Mode
Press F11 to enter full-screen mode. The large time display is easily readable from across a room – perfect for gyms, classrooms, or conference rooms.
Frequently Asked Questions
What is the difference between a stopwatch and a timer?
A stopwatch counts up from zero and measures elapsed time. A timer counts down from a set time and alerts you when it reaches zero. Use a stopwatch to measure duration; use a timer to set a time limit.
Can I use keyboard shortcuts?
After clicking Start, you can use the spacebar to pause and resume. This is handy when you need to keep your eyes on what you are timing rather than on the screen.
Will my data be saved?
No. This stopwatch does not store any data permanently. If you close the tab or reset, your times are gone. Copy important results before closing.