Tools / Calculators

Stopwatch

Hit start to begin timing instantly, record lap times, and see your fastest and slowest splits highlighted automatically.

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Stopwatch

00:00.00

Press Space to start/stop, L to record a lap

This page participates in the Coupang Partners program and may earn a commission from qualifying purchases.

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This page participates in the Coupang Partners program and may earn a commission from qualifying purchases.

Tool info

Category Calculators

Processing Directly in your browser

Data storage Not stored

Updated 2026-08-29

How to use

Click Start and timing begins immediately, down to the hundredth of a second.

Click Lap to add the current split and cumulative time to the record.

Once you have 2 or more laps, your fastest and slowest are highlighted automatically.

FAQ

자주 묻는 질문

Q1. How accurate is the timing?

It shows time down to 0.01 seconds (10ms), using the browser's high-precision timer (performance.now), which is accurate enough for typical stopwatch use.

Q2. What's the difference between split and total time?

The split is the time elapsed since the previous lap, while the total is the cumulative time from the start to that lap.

Q3. Can I control it with the keyboard?

Yes. Press Space to toggle start/pause and L to record a lap. This doesn't trigger while a text field is focused.

Q4. Does timing stop if I switch tabs?

No. It calculates based on actual elapsed time, so it stays accurate even if you switch to another tab.

Q5. Is my session saved?

No. Refreshing or leaving the page clears the record. All calculations happen entirely in your browser and are never sent to a server.

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