Stopwatch

How to Use the Online Stopwatch

• Press Start to begin counting elapsed time. The display shows hours, minutes, seconds, and centiseconds.
• Press Stop to pause the stopwatch at any moment.
• While stopped, the left button changes to Reset. Press it to clear the time back to 00:00:00.00.
• While running, press Lap to record a split time without stopping the stopwatch.
• Each lap entry shows both the split time and the total elapsed time for easy comparison.
• No sign-up or installation required. Works instantly in any browser.

Lap Timer - Track Every Split

The built-in lap feature lets you record multiple split times in a single session. Every time you press Lap, the current split is saved to the list below the stopwatch. This is ideal for:

• Tracking running or swimming lap times during training
• Measuring time taken for each step of a task or experiment
• Comparing performance across multiple rounds or intervals
• Recording study session segments or work sprints

Frequently Asked Questions

Does the stopwatch keep running when I switch tabs?

Yes. The stopwatch uses your device's real-time clock to track elapsed time accurately. Even if you switch to another browser tab, when you return the display will reflect the correct elapsed time automatically.

How accurate is the centisecond display?

The stopwatch displays time down to centiseconds (1/100th of a second), making it accurate enough for sports timing, experiments, and productivity tracking. Browser-based timers may have minor variance at very short intervals.

Can I record multiple laps?

Yes. There is no limit to how many laps you can record in a single session. Just press the Lap button each time you want to save a split, and all recorded laps will appear in the list below the display.

Is this stopwatch free?

Completely free. Open anpomodoro.com in any browser and the stopwatch is ready to use immediately. No account, no app download, no fees.