Online Stopwatch with Laps

A precise online stopwatch for tracking elapsed time. Whether you're timing laps, tracking task duration, or measuring experiments, this tool delivers millisecond accuracy.

How to Use the Stopwatch

• Start/Stop: Use the buttons or press Spacebar.
• Record Laps: Press Split (or key S) to record a lap time without stopping the clock.
• Analyze: View your full history of split times in the table below the timer.

Why Track Time?

Using a stopwatch isn't just for sports. It's a powerful tool for productivity benchmarking:

• Task Estimation: Time yourself doing routine tasks to improve your future planning. Learn how to estimate better.
• Flow State: See how long you can maintain deep focus before distraction hits.
• Deliberate Practice: Use lap times to measure improvement on repetitive skills. See our practice guide.

Features

• Millisecond Precision: Accurate timing for high-performance needs.
• Split/Lap Table: Shows both cumulative time and individual lap durations (+/-).
• Screen Awake: Prevents your device from sleeping during long timing sessions (if supported).