Timestamp-based timing
Elapsed time is calculated from the browser’s monotonic performance clock instead of counting animation frames.
All tools
Everyday timing · Free
Online Stopwatch
Time laps, splits, study sessions, presentations, and practice with a large precise display and useful session statistics.
Timing stays in this browser
Ready
00:00:00.00
SPACE · START / PAUSEL · LAPR · RESET
Laps
0
Fastest
–
Average
–
Slowest
–
Lap history
Split and elapsed times
No laps recorded yet
Start the stopwatch and press Lap or L.
How it works
Start instantly, inspect every lap.
Use the main controls or keyboard shortcuts, then keep the full timing record instead of only the final total.
- 01
Start the clock
Press Start or the Space bar. The stopwatch anchors itself to an elapsed timestamp so hidden-tab rendering does not become the time source.
- 02
Record laps
Press Lap or L without stopping the clock to capture both the latest split and total elapsed time.
- 03
Review or export
Compare fastest, slowest, and average splits, then copy the session or download a CSV file.
A proper browser stopwatch
Accurate underneath and easy to read.
Detailed lap tracking
Capture splits, total elapsed time, fastest and slowest markers, and an automatically updated average.
Presentation-ready controls
Switch precision, use keyboard shortcuts, open fullscreen, copy results, or export lap data as CSV.
Stopwatch questions
Precision, laps, shortcuts, and exports.
Does the stopwatch keep running in another tab?+
Yes. Visual updates may be paused by the browser, but elapsed time is recalculated from timestamps when the page becomes active again.
What is the difference between a lap and a split?+
The split is the time since the previous lap. Elapsed time is the total since the stopwatch first started.
How precise is the stopwatch?+
You can display centiseconds or milliseconds. Actual timing precision depends on the browser, device, power-saving behavior, and operating system.
Which keyboard shortcuts are available?+
Space starts or pauses, L records a lap while running, and R resets the stopwatch.
Can I export lap times?+
Yes. CSV export includes each lap number, split time, and total elapsed time in seconds with millisecond precision.
Is the stopwatch suitable for official competition timing?+
No. It is useful for everyday practice, study, presentations, and informal timing, but it is not certified sports-timing equipment.
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