How accurate is this online stopwatch?

Centisecond (1/100th second) precision using high-resolution timestamps. Stays accurate even when you switch tabs or minimize the browser.

Is there a limit to how many laps I can record?

Up to 999 laps per session. Each shows split time and delta. Cleared on reset.

Does the stopwatch keep running if I switch tabs?

Yes — it times in the background and updates when you return. A wake lock prevents your screen from sleeping.

What keyboard shortcuts are available?

Space — start/pause. L — lap. R — reset. Escape — stop. Active when no input is focused.

Free Online Stopwatch

Start. Lap. Split. Centisecond precision in your browser.

No laps recorded

Press Lap to record split times

Lap	Split	Delta

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How to Use the Online Stopwatch

Centisecond precision right in your browser — for workouts, cooking, laps, or anything you need to measure. No downloads, no sign-ups.

Starting and stopping: Hit Start or press Space. The clock counts up from zero in hh:mm:ss.cs format. Space toggles pause/resume. Escape stops.

Recording laps: Hit L or tap Lap to record a split. Each entry shows total elapsed time and the delta since the previous lap — making it easy to spot consistency or drift.

Keyboard shortcuts: Full keyboard control: Space — start/pause, L — lap, Escape — stop, R — reset. Active whenever no input field is focused.

Background timing: The stopwatch stays accurate across tabs and requests a wake lock to prevent your screen from sleeping. After stopping, your time and laps stay visible until you reset.

Frequently Asked Questions

How accurate is this online stopwatch?: Centisecond precision using high-resolution timestamps. Stays accurate even when you switch tabs.
Is there a limit to how many laps I can record?: Up to 999 laps per session. Each shows split time and delta. Cleared on reset.
Does the stopwatch keep running if I switch tabs?: Yes — it times in the background and updates when you return. A wake lock prevents your screen from sleeping.
What keyboard shortcuts are available?: Space — start/pause. L — lap. R — reset. Escape — stop. Active when no input is focused.

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Web vs App

Feature	Web (Free)	App (Freemium)
Timer types	Countdown, Stopwatch	Countdown, Count Up, Stopwatch, Counter
Custom workflows	Fixed per tool	Visual block builder
Templates	4 free web tools	30 customizable templates
Voice prompts	Browser TTS	Premium voice prompts
Offline support	Requires browser	Fully offline
Background execution	Tab must stay open	Lock screen notifications
Cloud backup	No	Google Drive sync (Pro)

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