Reaction Time Test
Tap the moment it turns green. Your score is the average of 5 tries. On online tests, 250–300ms is typical; under 220ms is fast.
This test measures how long your finger takes to move after you see the cue. MIKIRI measures the step before that: how fast you can read something that appears for an instant.
Can you read a number that vanishes in 0.4s?Bonus: can you read a number shown for 0.4 seconds?
Next after this test comes split-second vision. Try one round of the real MIKIRI mechanic right here.
The real game starts at 3 digits and slow, and ends with 12 digits in a blink. Free, no signup, world ranking.
Play MIKIRI free ▶| Rating | 5-try average | |
|---|---|---|
| S | < 220ms | Lab-grade fast |
| A | 220–260ms | Fast — top tier |
| B | 260–300ms | Around average |
| C | 300–340ms | Below average |
| D | ≥ 340ms | Get some sleep first |
How this test works
The screen turns red (wait) → green (go) after a random delay. We measure the milliseconds from green to your tap, and rate the average of 5 tries. Tapping before green is a false start and repeats the try.
Your number includes tens of milliseconds of display and touch latency — online results run slower than lab tests. Compare against yourself on the same device, not against lab figures.
How to get faster
- Hover your finger close to the screen; minimize the tap motion
- Soften your gaze over the whole area instead of staring at one point
- Sleep deprivation reliably slows you down — see our reaction time guide
Want a deeper test?
Try the F1 start-lights version, or see how MIKIRI compares to other test sites. Raw reaction is just the entrance. MIKIRI has seven free games — read-ahead reaction (NEXT), rapid recognition (FLASH), visual search (MATCH), trajectory prediction (INTERCEPT) — each with a global top-100 leaderboard.
Try other tests
FAQ
- What is the average reaction time?
- On online tests (device latency included), 250–300ms is typical. Large online datasets report medians around 270ms.
- Can I get under 200ms?
- Visual simple reactions have a physiological floor around 150ms. Under 200ms with device latency included is genuinely fast.
- Why do my results vary so much?
- Reaction time fluctuates with alertness. Judge yourself by 5-try averages — and by how the average moves across days.
- Is this test free?
- Completely free, no signup. Runs in any phone or desktop browser.