Stopwatch and Timer

A browser-based stopwatch and countdown timer with lap tracking. Start, stop, and reset with one tap.

Stopwatch and Timer tool

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Example

Input: Timer mode, 5m preset, then Start Timer

Result: Counts down from 00:05:00 (00:04:00 after one minute) to 00:00:00 and shows "Time is up!"

The countdown follows the real end time, so it finishes on schedule even while you use the Stopwatch tab.

  1. Choose between stopwatch mode for measuring elapsed time upward or countdown timer mode for counting down from a set duration.
  2. In stopwatch mode, tap Start to begin timing, then use the Lap button to record split times at each interval you want to track.
  3. In timer mode, set the desired countdown duration in hours, minutes, and seconds, then tap Start to begin the countdown.
  4. View recorded lap times in the scrollable table showing each individual lap duration alongside the cumulative elapsed time.
  5. Tap Pause to stop either mode and Resume to continue, or tap Reset to clear the session and start fresh (on the stopwatch, Reset appears once it is paused).

Online Stopwatch and Countdown Timer

This is a stopwatch that counts up to the hundredth of a second, and a countdown timer that beeps when it reaches zero. Both run in your browser with no setup. Tap Stopwatch or Timer at the top to switch between them.

The stopwatch has Start, Pause, Lap and Reset. Each lap shows two numbers: the time for that lap alone, and the total time when you pressed Lap. The newest lap sits at the top. Runners use this for split times, cooks for timing steps, and speakers for timing each part of a talk. Reset appears once the watch is paused, so a stray tap does not wipe a running session.

The timer takes hours, minutes and seconds, or you can use a quick preset from 1 minute to 1 hour. The display turns red in the last 10 seconds. At zero it plays a short beep and shows "Time is up!". The timer follows the real end time, so it stays accurate if you switch to the stopwatch or another browser tab. Keep your sound on to hear the alert.

Both modes keep running when you switch between them. You can time a workout on the stopwatch while a rest timer counts down. For focused work in set blocks, the Pomodoro Timer runs the breaks for you. For long waits counted in days, use the Days Until and Countdown Calculator.

Frequently Asked Questions

Yes. The timer works out the time left from the real clock, so it stays accurate in the background. It is also set to finish on schedule even when the tab is hidden, when browsers slow down screen updates. The stopwatch also measures real elapsed time, so the reading is right when you come back.
Start the stopwatch, then tap Lap each time a runner passes or a stage ends. Each row shows the lap's own time with a plus sign, such as +00:01:32.40, and the running total next to it. The copy button copies the total time for that lap.
Yes. At zero it plays a short beep and shows "Time is up!" on screen. The beep is quiet and brief, so turn up your volume if you are across the room. Some phones mute web audio in silent mode, so watch the screen as well.
Very accurate for everyday use. It reads a high-precision clock in your browser and shows hundredths of a second. The screen may skip a few hundredths between updates, but the elapsed time stays correct. For official race timing, use dedicated timing gear.

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