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Online stopwatch

Start, stop and reset the clock, capture each lap or split, then export the timing history when you are done.

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Read lap times and total elapsed time

The stopwatch measures elapsed time and records each lap without stopping the clock. A lap's split is the time since the previous lap; its total is the time since the measurement began.

How to use it

  1. Start the stopwatch, then record a lap at each checkpoint.
  2. Stop to pause the measurement and start again to continue. Reset clears both elapsed time and laps.
  3. Once a lap exists, export the lap number, split and total as a CSV file.

Example

Starting point
Two laps recorded at total times of 30 seconds and 65 seconds.
What to expect
The second lap has a 35-second split and a total of 1 minute 5 seconds.

Before you start

  • Hundredths are displayed, but click timing, device load and clock changes affect the measurement. This is not calibrated timing equipment.
  • State is kept in this browser when local storage is available. Export important laps before clearing browser data or switching devices.