⏱️ High Precision Stopwatch

Online Stopwatch with Split Laps

Millisecond-accurate online stopwatch for sports, classroom quizzes, studying, workouts, and cooking. Easy split lap recording.

00:00:00.000

Applications of the Online Stopwatch:

Athletic Training & Running: Record lap intervals during track sprints, swimming sets, or cycling time trials.
Classroom & Exam Timings: Teachers and proctors can display the fullscreen digital stopwatch during tests, quizzes, and group debates.
Productivity & Speedcubing: Track Rubik's cube solve times or Pomodoro study sprints with millisecond precision.

Frequently Asked Questions (FAQ)

❓ How accurate is this online stopwatch?

PiliApp's Stopwatch uses the high-resolution browser performance clock (`performance.now()`) synced with `requestAnimationFrame`, providing millisecond-accurate timing even during heavy background tasks.

❓ What does the Lap feature do?

Clicking 'Lap' records the exact split time and total elapsed time without pausing the main stopwatch clock. The fastest lap is highlighted in green and the slowest in red.

❓ Does the stopwatch keep running if I switch browser tabs?

Yes! Because timing is calculated against absolute Unix timestamps, the stopwatch retains 100% accuracy even when minimizing the browser or switching between tabs.