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 fifteen 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
Before you decide whether your number is fast or slow
A reaction test result is not a pure measurement of your nerves. Some of it always comes from your setup. Splitting the number into parts shows why comparing with other people rarely makes sense:
- Getting onto the screen (0–16.7ms). A 60Hz display redraws every 1/60 s, so the green can appear up to one frame late. At 120Hz that halves.
- Noticing and deciding to press. This is the part you actually want to measure.
- Moving the finger. Hovering above the screen and resting on it give different results.
- From touch to record (a few ms to tens of ms). Touch panel scanning, Bluetooth input latency, and the time the browser takes to receive the event.
A wired mouse on a 120Hz monitor and a Bluetooth keyboard on a 60Hz laptop will give the same person different results. The only fair comparison is with your own earlier results on the same device.
Look at the median, not the average
This test shows the average of five tries, but if you are keeping a log, the median is steadier. One lapse — a notification, a moment of distraction — pulls an average up a long way.
Reaction times are not spread symmetrically. There is a floor on the fast side, but the slow side can stretch out almost without limit. In a distribution shaped like that, the average is dragged towards the unlucky slow tries.
To keep results comparable, fix the device, the grip, the time of day and the number of tries. If you keep retrying until you get a good one, your record drifts towards your luckiest attempt and stops telling you anything about change.
Add movement and it becomes a different number
This page measures simple reaction: press in place as soon as the signal appears. When you have to move your finger to another spot first, the time to travel and aim is added on top.
MIKIRI's NEXT is built exactly that way, and players' results there cluster clearly slower than typical simple reaction times (see the statistics page). That is not a difference in ability; it is a different task.
When you feel "slow", you only find out whether it is the reaction, the movement or the hesitation by measuring them separately.
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.