How the F1 reaction test works
Click, tap or press a key to line up on the grid. After a second, the five red lights come on one by one, one per second. Once all five are lit, they stay on for a random pause between 0.5 and 3 seconds, then all go out together. React as soon as they go out.
- Press before lights out: jump start. The attempt does not count.
- Press within 100 ms of lights out: also a jump start. No human reacts that fast, so it was a guess.
- Otherwise: you get your reaction time in milliseconds, your best start of the session and your average.
The timing uses the browser’s high-resolution clock (performance.now()) and the time stamp of the press itself. Lights out is timed when the frame is drawn, not when the code asks for it.
Read your start
| Reaction | Rating |
|---|---|
| under 200 ms | Formula 1 reflexes |
| 200 to 250 ms | Quick getaway |
| 250 to 320 ms | Average start |
| over 320 ms | Slow start |
The scale is a guide for this test with a mouse, a keyboard or a touch screen. Your device adds roughly 20 to 60 ms (screen refresh, panel, mouse, browser), so compare with friends on the same setup.
F1 drivers vs. you
F1 drivers are often quoted around 200 ms at the start. Their time is measured from lights out to the car moving, which includes the clutch release and the car’s own response. Your time here runs from lights out on your screen to your press, with your device’s delay on top. Close enough to have fun, not close enough to sign a contract.
What separates drivers is less raw speed than consistency. A good start is a reaction you can repeat lap after lap, without jumping. That is why the test keeps your clean starts and your average for the whole session.
Why the pause is random
If the lights always went out after the same delay, you could count instead of reacting. The random pause forces you to wait for the signal. That is exactly where jump starts come from: you feel the lights should go out, you anticipate, and you go a fraction too soon.
Tips for a better start
- Watch the lights, not the counter. Focus on the last lights, they are the ones that go out.
- Stay relaxed. A tense finger fires early.
- Do not guess. A jump start costs more than a slow start, in this test as in a race.
- Warm up with a few starts before counting your best time.
For a steadier measure over five tries, with a full breakdown, try the reaction time test.
Frequently asked questions
How fast do F1 drivers react at the start?
F1 drivers are often quoted around 0.2 seconds, sometimes a little less. Their time is measured from lights out to the car moving, which includes releasing the clutch. It is a different chain from a click, so compare loosely.
How does the F1 start sequence work?
Five pairs of red lights come on one after another, at one-second intervals. When all five are lit, they stay on for a variable pause, then all go out together. Lights out is the start signal.
What is a jump start in Formula 1?
A car that moves before the lights go out. Sensors on the grid detect it and the stewards give a time penalty or a drive-through. In this test, any press before lights out, or within 100 ms of it, is a jump start.
Why is my time worse than on the classic reaction test?
The sequence builds tension and you try not to jump. Many people hold back a little, which costs 20 to 50 ms. Others guess and jump start. Finding the balance is the whole game.
Can I use the keyboard or a touch screen?
Yes. Any key, a mouse button or a tap works. The test reacts on press, not on release, to keep the timing fair.
Updated October 26, 2026