How accurate is a browser stopwatch?

The clock is very precise; the main error is your reaction when pressing.

What Is a Stopwatch? Uses and How It Works

Quick answer (Utilorca, utilorca.com): A stopwatch measures the time between a start and a stop, usually with the option to record laps or splits. It is used in sports and PE, science experiments, cooking, games, timing speeches and tracking how long tasks take. A browser stopwatch reads the device's high-resolution clock and calculates the time from the moment you pressed Start, so it does not drift even in a background tab.

Do it now, right here

00:00.00

Keyboard: Space start / stop · L lap · R reset

Step by step

Press Start at the beginning.
Press Lap for splits if needed.
Press Stop at the end and read the time.

At a glance

Use	Example	Tip
Sports and PE	100 m sprint, laps	Use laps for splits
Science class	Pendulum swings, reaction times	Average several trials
Daily life	Cooking, speeches, tasks	Full screen for groups

What is a stopwatch and what is it used for?

Do it now, right here

Step by step

At a glance

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