Reaction Time Test
Wait for the box to turn green, then click or hit space as fast as you can. Five rounds, random delays, and your average, median, and best in milliseconds.
No permissions. Mouse or spacebar.
Last
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Average
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Median
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Best
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Five rounds, random 1.5-4.5 s delay each. Use the mouse button or the spacebar -- whichever you actually game with. The number includes your monitor's and input device's own latency, so the same person scores a little faster on a 240 Hz screen than on a 60 Hz one.
Frequently Asked Questions
What's a good reaction time?
On a mouse or keyboard, most people land somewhere in the 200-300 ms range, and competitive FPS players tend to sit below that. Treat those as rough bands, not a scoreboard: the number includes your monitor's refresh rate, your mouse's own latency, and the browser, so the same person scores differently on different hardware.
Why five rounds instead of one?
A single trial is mostly luck -- you can guess the timing. Five rounds with a random 1.5-4.5 second delay each give an average and a median that actually reflect you. The median ignores one lucky or one distracted round.
Does the monitor's refresh rate affect the result?
Yes, measurably. The screen can only show green on its next refresh, so a 60 Hz monitor adds up to 16.7 ms before you can even see the change, versus about 4 ms at 240 Hz. If you're comparing setups, run this on each and the gap is real.
Mouse or spacebar?
Use whatever you game with. Both work here. A mechanical keyboard and a gaming mouse typically register a press within a few milliseconds; a wireless office mouse in power-saving mode can add far more.