FREE · DEVICE TESTS
Reaction Time Test.
Test how fast you react: click as soon as the box turns green, over five rounds, and see your average and best time in milliseconds.
- Average
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- Best
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- Rounds
- 0 / 5
- Results
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Typical visual reaction times are around 200–300 ms. Results include your screen and mouse delay (often 10–50 ms), so compare yourself on the same device.
How to use Reaction Time Test
Click the box to start, wait for green, then click (or press Space) as fast as you can. Clicking too early restarts the round.
How it works
The green screen appears after a random 1.5–5 s delay so it cannot be anticipated; the time from the colour change to your click is measured with the high-resolution clock.
Example
Rounds of 232, 251, 219, 244 and 238 ms give an average of 237 ms.
Questions about Reaction Time Test
Is Reaction Time Test free, and do I need an account?
Yes. This tool is free to use in your browser without an account. Processing takes place on your device.
What are the limits and what should I check?
Results include screen and input delay. Everything is calculated in your browser; nothing you type is uploaded. Review the result before using it in your work.
Is my input sent to a server?
Your input is processed in your browser and is not uploaded by this tool. Files and pasted text are cleared when the page is refreshed. Normal website requests are still required to load the page and its libraries. Read the privacy explanation.