Quick Countdown Timers
Features
Millisecond Precision
Accurate timing down to 10ms for precise measurements
Lap Times
Record unlimited lap times with individual and cumulative tracking
Fullscreen Mode
Large display perfect for presentations and visibility
Keyboard Shortcuts
Space to start/stop, L for lap, R for reset
Lap Statistics
View fastest, slowest, and average lap times
Dark Mode
Easy on the eyes with automatic theme support
How to Use the Online Stopwatch
Start the Timer
Click the Start button or press Space to begin timing.
Record Lap Times
Click Lap or press L to record split times without stopping.
Stop & Reset
Click Stop to pause, then Reset or press R to clear.
Frequently Asked Questions
An online stopwatch is a digital timing tool that runs in your web browser. It works just like a physical stopwatch but is accessible from any device with internet access. Our stopwatch offers millisecond precision, lap times, and works even when offline.
Yes, our online stopwatch is completely safe. It runs entirely in your browser, doesn't collect any personal data, and doesn't require any downloads or installations. Your timing data stays on your device.
A stopwatch measures elapsed time from when you press start until you press stop. It uses JavaScript's high-resolution timer to track time in milliseconds. The display updates continuously to show hours, minutes, seconds, and centiseconds.
A stopwatch counts up from zero to measure elapsed time, while a timer counts down from a set time to zero. Use a stopwatch when you want to see how long something takes. Use a timer when you need to be alerted after a specific duration.
Absolutely! This stopwatch is perfect for study sessions. Use it to time your focus periods, track how long you spend on different subjects, or implement the Pomodoro technique. The lap feature is great for timing individual study blocks.
The display shows HH:MM:SS.ms format. From left to right: hours (00-99), minutes (00-59), seconds (00-59), and centiseconds (00-99). For example, 01:23:45.67 means 1 hour, 23 minutes, 45 seconds, and 67 centiseconds.
For quick control: Space - Start/Stop, L - Record Lap, R - Reset, F - Toggle Fullscreen. These shortcuts work when the page is focused.
Yes! Once the page is loaded, the stopwatch works completely offline. It uses your device's clock and doesn't need an internet connection to function. Great for areas with spotty connectivity.
Our stopwatch can run for up to 99 hours, 59 minutes, and 59.99 seconds. That's over 4 days of continuous timing! It will continue running even if you switch browser tabs.
Yes! The stopwatch is excellent for sports timing including running, swimming, cycling, and workouts. The lap feature lets you track individual splits, and the statistics show your fastest, slowest, and average times.