Online Stopwatch with Laps — Free & Accurate
← Clocktower TownThe Creative Island · Island 07
A clean stopwatch with lap times — for training, cooking, experiments and 'how long does this really take'.
00:00.0
How to use this tool
- Press Start — the clock runs in tenths of a second.
- Press Lap at each checkpoint — lap times are listed with the fastest marked ★.
- Pause and resume freely; Reset clears everything.
Example
Timing a 3-lap run: laps 02:31.4, 02:28.9 ★, 02:33.0 — the second lap is flagged best, so you know your consistent pace is around 2:30.
The formula
elapsed = accumulated time + current running stretch (measured in milliseconds)
What the result means
The lap list shows both total time and each split, with the fastest lap starred — useful for pacing, workouts, or finding which step of a process eats the most time. Keep the tab in the foreground for the steadiest accuracy.
Frequently asked questions
How accurate is a browser stopwatch?
It uses the system clock (millisecond precision), so timing is accurate; the display updates every 50 ms. For official sports timing, use a certified device.
Do laps keep counting when paused?
No — pause freezes the clock; resume continues from the same total. Laps are only captured while running.
Why does it slow down in a background tab?
Browsers throttle background timers to save battery. Keep the tab visible while timing anything important.
Is it really free with no ads?
Yes — and it runs entirely in your browser.
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Unit ConverterEvery conversionFuel Cost CalculatorTrip costAge CalculatorExact ageSleep CalculatorWhen to sleep
Explore the island world
- Clocktower Town — the island where this tool lives.
- The Main Island — drive the boat, explore the whole world.
- The 90s Kids Island — where most of us started.
Privacy & data: this tool runs entirely in your browser — nothing you type is uploaded, saved or sent anywhere. · Disclaimer: results are estimates for everyday planning — rates and rules change, so verify with official bills and documents where it matters. · Privacy Policy · Disclaimer
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