Stopwatch

Measure elapsed time, pause and resume, and record up to 100 cumulative lap timestamps. Keep the tab open and note browser timing limitations.

Time a practice task or compare checkpoints during a session. Start the stopwatch, record a lap while it is running and pause without discarding the elapsed total. Lap entries show cumulative elapsed timestamps, not automatically calculated durations between laps.

100% free
No registration
On your device
Modern browser

Elapsed time

00:00:00.00

Your input stays on this device for this operation. We don’t upload or store it.

About Stopwatch

Pause and continue

Resuming adds new elapsed time to the stored total.

Up to 100 lap entries

Records cumulative timestamps during the running session.

Hundredths display

Shows hundredths of a second, with display updates scheduled approximately every 50 milliseconds.

How to use Stopwatch

1
Start timing
Press Start stopwatch when your activity begins.
2
Record checkpoints
Use Record lap while running. Pause stopwatch to hold the total, then Start stopwatch to continue.
3
Record before resetting
Copy down the needed timestamps before Reset stopwatch clears both elapsed time and laps.

Formats and practical limits

Input: Start, Pause, Record lap and Reset actions. Output: elapsed time and up to 100 cumulative lap timestamps.

No lap download, automatic interval analysis or persistent session storage is provided.
Use an independent suitable device for safety-critical or officially timed activities.

Practical example

Laps of 00:00:12.50 and 00:00:27.00 are cumulative checkpoints. The interval between them is 14.50 seconds.

Frequently Asked Questions

3 answers

Are these individual lap durations?

No. Each entry is the elapsed total at the checkpoint. Subtract the previous timestamp if you need the interval between two laps.

Will timing survive a page refresh?

No persistence is implemented for the elapsed state or lap list. Keep the tab open and record your results before closing or refreshing.

Does the hundredths display guarantee precision?

No. Display precision is not a timing certification. Browser scheduling, background tabs and device sleep can affect what you see.

About Stopwatch

Pause and continue

Up to 100 lap entries

Hundredths display

How to use Stopwatch

Start timing

Record checkpoints

Record before resetting

Formats and practical limits

Practical example

Frequently Asked Questions

Related Utilities tools

Timer

Unix Time Converter

Internet Speed Test

Barcode Generator