Reaction Time Test — 5 Modes
Measure your reaction time in milliseconds across five test modes. No signup, no file upload, no account needed — everything runs in your browser.
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About the Reaction Time Test — 5 Modes
A reaction time test measures how quickly you can respond to a visual or auditory cue, in milliseconds. This tool gives you five modes — simple green-light reaction, F1 start lights, Go/No-Go with colour decoys, corner-target clicking, and WASD key selection — each with a different cognitive demand. Set a timer from 1 to 10 attempts, watch the lights or keys, and press the moment the signal changes. Your average, median, best and consistency are calculated from performance.now(), the browser's highest-resolution clock, so the number is as accurate as your hardware can be.
Reaction time is the single most direct measure of your visual-motor response speed, and it is the number esports players, surgeons, and pilots actually track. Unlike a CPS test, which measures how fast you can mash, a reaction test measures how fast you can notice and respond. The five modes isolate different skills: Simple measures raw latency, Go/No-Go adds inhibition, Target adds a mouse-movement component, and WASD adds a motor-choice component. Everything runs in your browser — no file is uploaded, no account is created, no score is stored — so a run is private and every attempt starts clean.
How to use the Reaction Time Test — 5 Modes
- Pick a mode. Start with Simple Reaction: a red panel turns green and you press Space, click, or tap.
- Wait for the random 1–3 s delay, then respond the instant the signal appears. Pressing early is a false start and the attempt repeats.
- Complete the full set (default 5 attempts, or 1 / 3 / 10). Your average, median, best, and consistency are shown with a ranking band.
- Try Go/No-Go, F1, Target, or WASD to measure a harder demand. Use "Copy result" to share a score.
Typical reaction time by mode
| Mode | Typical range | What it measures |
|---|---|---|
| Simple Reaction | 200–300 ms | Raw visual latency |
| F1 Lights | 250–350 ms | Pattern + stop |
| Go/No-Go | 300–450 ms | Inhibition + latency |
| Target Click | 350–550 ms | Latency + mouse move |
| WASD Keys | 300–450 ms | Latency + motor choice |
Values from a 5-attempt run on a 60 Hz display. Your results will vary with hardware, refresh rate, and input device.
Frequently asked questions
What is a good reaction time?
On a browser test, most adults average 200–300 ms in Simple mode. Under 200 ms is quick, under 150 ms is rare on consumer hardware, and below 100 ms is physically impossible without a hardware calibration — so a sub-100 ms result is treated as a false start. Go/No-Go and Target modes read 100–250 ms slower because they add a decision or a mouse-movement component.
Is this reaction time test free and no signup?
Yes. Completely free, no downloads, no signup, no file upload, no account. Everything runs in your browser. Your scores are not stored on our servers and not stored in your browser after the page reloads.
How accurate is an online reaction time test?
The browser measures elapsed time with performance.now(), a high-resolution clock, but the result includes your display refresh, input latency, and browser overhead. A 60 Hz monitor adds up to 16.7 ms of frame delay; a 240 Hz monitor adds as little as 4.2 ms. The test cannot calibrate hardware, so compare runs on the same setup. Esports players typically read 150–200 ms here, not the 100 ms quoted on marketing pages.
Why did my attempt repeat?
A false start (pressing before the signal), a wrong key in WASD mode, a wrong corner in Target mode, a reaction to a decoy colour in Go/No-Go, or a sub-100 ms response (a late guess, not a real reaction) all repeat the attempt. Sub-100 ms is physically impossible without hardware calibration, so the tool treats it as a guess.
Can I use this on a phone?
Yes. Tap the large panel to start, wait for the colour change, then tap again. Touch input and screen delay add 10–40 ms compared to a desktop mouse, so keep phone and desktop results separate when tracking progress.
How is this different from a CPS or spacebar test?
A CPS or spacebar test measures how fast you can mash — it counts presses per second. A reaction test measures how fast you can notice and respond to a single cue. The two numbers measure different skills: CPS is rate, reaction time is latency. Esports players track both: high CPS helps with mechanics, low reaction time helps with spotting and duels.
Guides
- How to Measure Your Reaction Time in 5 Different Ways
Five ways to measure your reaction time, what the milliseconds actually mean, and how to get a reliable number that is not just a lucky guess.
- What Is a CPS Test and How to Test Your Clicking Speed
A CPS test measures how many clicks you can make in one second. Here is what CPS means, how to run a click speed test, and how scores compare.
- Spacebar Counter — Test and Improve Tapping Speed
A spacebar counter measures how many times you can hit the spacebar in a set time. Here is how the test works and what the numbers mean.