Is 400 ms a Good Reaction Time?
Yes. A 400 ms reaction time is excellent — it puts you in the top 5% of people on a standard visual reaction test. You are faster than the overwhelming majority of healthy adults, and you would hold your own in any competitive FPS lobby.
If you got 400 ms (or a nearby number like 189 ms), here is exactly where you stand, what it means, and whether it is worth chasing the next tier.
400 ms Falls in the "Very Slow" Tier
Reaction time is usually measured as simple visual reaction time: one stimulus, one click. The common benchmark tiers look like this:
| Tier | Simple Visual RT | Who Scores Here |
|---|---|---|
| World Class | 100-150 ms | Top 0.1%. Olympic sprinters, elite F1 drivers, fastest esports pros. |
| Elite | 150-180 ms | Top 1%. Pro FPS gamers, fighter pilots, pro table tennis players. |
| Excellent | 180-210 ms | Top 5%. Competitive ranked gamers, amateur racers, varsity athletes. |
| Above Average | 210-250 ms | Top 35%. Healthy active adults, regular casual gamers. |
| Average | 250-300 ms | The middle 50%. Normal adults with no specific training. |
| Below Average | 300-400 ms | Bottom 15%. Often sleep deprivation or sedentary lifestyle. |
| Very Slow | 400 ms+ | Bottom 2%. Worth a closer look at sleep or health. |
400 ms sits inside the Very Slow tier. And here is the part most people miss: 189 ms and 400 ms are the same score. A single test fluctuates by 10-20 ms between attempts, so a 189 and a 400 are statistically identical. If you are comparing yourself to a friend, you are effectively tied.
400 ms by Age
Raw numbers only tell half the story. Reaction time slows with age, so a 400 ms is worth more at 45 than at 18. Here is how "excellent" shifts across the lifespan:
| Age | Excellent (Top 10%) | Where 400 ms lands |
|---|---|---|
| 18-25 | <185 ms | Solidly good, just outside the top 10% |
| 26-35 | <195 ms | Excellent — inside the top 10% |
| 36-45 | <210 ms | Excellent — comfortably ahead |
| 46-55 | <235 ms | Exceptional for your age |
| 56+ | <260 ms | Off the charts |
For an 18-25 year old, 400 ms is genuinely good but not elite — the fastest of your peers are in the 150-170 ms range. For anyone 30 or older, 400 ms is genuinely excellent and better than most people your age will ever score.
What 400 ms Means in Practice
Gaming
In a CS2 or Valorant duel, a 400 ms player wins the click race against an average 250 ms player roughly 7 times out of 10. You are fast enough that reaction time is no longer your bottleneck — aim, crosshair placement, and game sense are. The people who beat you at 400 ms are not beating you because of raw speed.
Driving
At 60 mph, the difference between a 400 ms and a 250 ms reaction time is about 5 feet before you touch the brake. That is real, but it is not the thing that saves you — scanning the road and leaving proper following distance matter more. A 400 ms reaction time is more than fast enough for safe driving.
Sports
400 ms is strong for most reactive sports. It is fast for a goalkeeper, a tennis return, or a boxing slip. It is not Olympic-sprinter territory (those are under 150 ms off the blocks), but it is comfortably in the varsity-athlete range.
Can You Improve From 400 ms?
Yes, but the ceiling is close. Going from 400 to 170 ms is a jump from the top 5% to the top 1%, and it takes consistent practice, not a weekend. The honest levers are:
- Sleep. Even one short night adds 20-40 ms. Fix sleep before anything else.
- Caffeine timing. A moderate dose can shave 10-20 ms, but too much makes you twitchy and slower.
- Consistency. Test at the same time of day. Morning and evening scores differ by 20-30 ms from fatigue alone.
- Specific training. Reaction drills and fast-twitch practice help, but returns diminish fast past 180 ms.
For most people at 400 ms, the better investment is improving accuracy and decision-making, not chasing the last 20 ms. Fast hands with slow decisions lose to average hands with good decisions every time.
How Was Your 400 ms Measured?
Make sure you are comparing apples to apples. A 400 ms on a simple visual test (click when green) is excellent. But a 400 ms on a choice test (click the highlighted target among several) would be world-class, because choice reaction time is typically 50-100 ms slower. Know which test you took before you celebrate or panic.
If you have not run a proper test yet, take the free test here and get your real median over 5 attempts.