Click anywhere to start. This is a simple tool to measure your reaction time. The average (median) reaction time is 273 milliseconds, …

5 days ago · The meaning of REACTION is the act or process or an instance of reacting. How to use reaction in a sentence.

Online reaction time test. Click as soon as the field turns green. Average and best time, attempts, CSV export, and built‑in self‑tests.

How fast are your reflexes? Take the reaction time test and find out your speed in milliseconds. Compare your score to averages by …

Reaction Look up in Wiktionary, the free dictionary. Reaction may refer to a process or to a response to an action, event, or exposure.

Measure your response speed and compare it with others. Take the test now on our website.

A chemical reaction is the change that happens when two or more substances are mixed with each other.

Usage: Reaction is used to refer both to an instant response (her reaction was one of amazement) and to a considered response in …

A reaction is an action taken in response to something. If you're telling your parents that you want to move out, you'll see by their …

May 25, 2026 · A chemical reaction is a process in which one or more substances, the reactants, are converted to one or more …