Online Stopwatch
Free online stopwatch with lap times and millisecond precision. Perfect for sports, workouts, cooking, and more.
Frequently Asked Questions
How accurate is this online stopwatch?
Our online stopwatch is accurate to the millisecond (1/1000th of a second). It uses your browser's high-resolution timer for precise time measurement, making it suitable for timing sports, workouts, cooking, and other activities.
Can I use this stopwatch on my phone?
Yes! This stopwatch is fully responsive and works on all devices including smartphones, tablets, and desktop computers. Simply open this page in your mobile browser to use it anywhere.
What are lap times and split times?
Lap time shows how long each individual lap took, while split time shows the total elapsed time at the moment you pressed the lap button. Lap times are useful for comparing individual segments, while split times track cumulative progress.
Will the stopwatch keep running if I close the browser tab?
No, the stopwatch requires the browser tab to remain open. If you close or refresh the page, the timer will reset. For timing longer activities, consider using the countdown timer tool instead.
How do I use the stopwatch for interval training?
Use the lap button to mark each interval. After your workout, you can compare lap times to track your performance across intervals. The stopwatch displays both individual lap times and cumulative split times for comprehensive tracking.