Stopwatch & Timer
A precise stopwatch with lap tracking and a countdown timer with presets. Switch between modes instantly using the toggle above.
How to Use the Stopwatch
Click Start to begin timing. The display shows hours, minutes, seconds, and milliseconds. Press Lap to record a split time without stopping the clock. Each lap entry shows the individual lap duration and the cumulative total time. Use Reset to stop and clear everything.
How to Use the Countdown Timer
Set the desired duration using the hours, minutes, and seconds inputs, or click a preset button for common durations. Press Start to begin the countdown. A progress bar shows how much time remains. When the timer reaches zero, the display flashes and a beep sound plays. The 25-minute preset is ideal for the Pomodoro Technique.
The Pomodoro Technique
The Pomodoro Technique is a time management method that uses 25-minute work intervals separated by short breaks. Work for 25 minutes, take a 5-minute break, and repeat. After four cycles, take a longer 15-30 minute break. Use the preset buttons to quickly set up your work and break timers.
Accuracy and Precision
This stopwatch uses performance.now() for millisecond-precision timing and requestAnimationFrame for smooth display updates. The countdown timer uses the same high-resolution timing to ensure accuracy even during long countdowns.