KOEN

Reaction Time Test

REACTION · TIME

Test your reaction time: tap the instant the screen turns green, play 5 rounds and get a grade from your average in milliseconds. Your best is saved locally.

Tap to start
Tap as fast as you can when the screen turns green
ROUND 1 / 5
    AVERAGE —
    BEST AVG —
    BEST SINGLE —
    How it works
    • Tap the screen and it turns red. After a random 1.5–4 seconds, it turns green.
    • The moment it turns green, click, tap or press Space.
    • Tap before green and it’s a false start. You’ll redo that round.
    • Your grade is based on the average of 5 rounds, and your best scores are saved in this browser.
    HOW TO

    How to use

    1. Tap or click the box to start. It turns red while you wait.
    2. The moment it turns green, tap, click or press Space as fast as you can.
    3. Tapping before green is a false start, and that round is replayed.
    4. After 5 rounds you get your average and a grade. Your best average and best single time are saved.
    PAIRS WELL WITH

    Pairs well with

    FAQ

    FAQ

    What's a good reaction time?

    Most people average around 250–300 ms on a test like this. Under 220 ms is quick, and under 180 ms is exceptional.

    Why are my results different on another device?

    Screen refresh rate, input lag and browser timing all add a few milliseconds. For fair comparisons, test on the same device.

    Where are my best scores stored?

    Only in this browser. Use Reset best to clear them at any time.