What is Reaction Time Test?

Reaction Time Test measures how quickly you can respond to a visual cue or an audible beep. Pick a mode, then click the panel or press the spacebar the instant the cue fires — your reaction time is measured in milliseconds. Track your performance across multiple attempts to see your average and personal best.

Each round shows a coloured panel that switches to green after a random 1–5 second delay. Switch to Audio mode and the cue becomes a short beep instead, so the test is purely auditory. Click the panel or hit space the moment the cue lands and the timer records the response using performance.now(), with sub-millisecond precision. Every attempt is rated against five performance tiers (Elite, Excellent, Good, Average, Slow), and a one-line comparison tells you how your time stacks up against gamers, pilots, and the average adult. The stats panel tracks attempts, best, average, and worst time for the session, and your all-time best is saved on this device so it's waiting for you to beat next visit. There's also a Go/No-Go mode that mixes in red traps: you click on green but must hold still on red, which tests impulse control on top of raw speed. Every result also shows the percentile it lands in, so you can see roughly what share of people you'd beat.

How to use

1. Step 1 — Click the colored area to begin and wait for it to turn green.
2. Step 2 — Click as fast as you can the moment the screen turns green.
3. Step 3 — View your reaction time in milliseconds and try multiple rounds to improve your average.

When to use

• Quick warm-up before a gaming session to check whether your hands are awake.
• Settling a 'who's faster' argument with a friend using identical conditions.
• Tracking how caffeine, sleep, or screen brightness shifts your visual response time.

Result

Test your reflexes over 5 rounds and compare your average reaction time against the typical human average of 200-250 milliseconds.

FAQ

What's considered a good reaction time?

Median reaction time to a simple visual cue is around 250 ms for adults. Anything below 200 ms is fast, and competitive gamers often clock 150–180 ms. Add 20–40 ms of input lag from the display and mouse, which you can't shave off.

Why does it say 'too early' even though I waited?

The green flash is delayed by a random 1 to 5 seconds to prevent anticipation. If you click before the colour changes, the round is voided. Wait until you actually see green before pressing — clicking early on purpose to game the result isn't measured.

Does my mouse or screen latency affect the reading?

Yes. A 60 Hz monitor adds up to 16.7 ms of waiting time per frame, and most wireless mice add another 10–20 ms. The test measures total visual-to-click latency, so part of your number is hardware. Use the same setup to compare runs.

How many attempts should I run for a meaningful average?

Five rounds smooth out one or two unlucky clicks. Ten is better if you want a stable number to compare across days. The average ignores any 'too early' rounds, so they don't drag your score down.

Can I use this on a touchscreen instead of a mouse?

Yes. The test listens for a click, a tap, or a press of the spacebar, so phones, tablets, and keyboards all work. Touch tends to be 5–15 ms slower than mouse click because of the digitiser scan rate, and spacebar is usually the most consistent input on desktop. Switch to Audio mode and the green flash is replaced by a short beep — audible reactions are typically 20–40 ms faster than visual ones.

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