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The keyboard CPS test measures how many keystrokes you land per second, counted from real keydown events on a millisecond clock. Competitive Minecraft players made this number famous around 2015, when 1.8 era PvP servers such as Kohi rewarded raw click speed in every duel. ClackLab runs the same measurement for your keyboard, with the phantom repeats your operating system generates filtered out before anything is counted.
The score is not a party trick. Actions per minute in strategy games tracks it, and so does burst reliability in fighting game inputs. A two minute test shows where you sit.
Pick a window from 1 to 60 seconds and hammer any key. Behind the scenes the engine attaches a timestamp to every keydown event using performance.now(), the browser's sub-millisecond clock. Nothing is sampled or estimated. Each press is a real event with a real time attached.
Three numbers come out of those timestamps. Average CPS divides total presses by elapsed time, which is the headline figure. Peak CPS finds your best single rolling second, and that is the honest measure of burst speed. Consistency compares the standard deviation of your intervals against the mean, so two people with the same average get separated by rhythm quality.
A 1 second test is a pure twitch sample. A 60 second test is an endurance event, and most people watch their average fall by a third as fatigue lands around the 25 second mark. Try both, because the gap between the numbers says more about you than either one alone. Warm up before you judge yourself. First attempts of a session read 5 to 10 percent slow, and every speed test on this site shows the same warm up curve, so log your third run rather than your first. Sprinters post huge short scores that collapse on the long run. Grinders hold a lower pace and never fade.
Benchmarks from public click tests put casual single-finger pressing between 4 and 6 CPS. Trained typists with clean rhythm land 6 to 8. Anything above 10 with one finger is elite territory, and scores past 12 need a two finger technique on the same key.
Hardware moves the number less than people hope. A Cherry MX Red switch actuates at 2mm with 45 grams of force. A rubber dome membrane needs roughly 4mm of travel before it registers at all. That difference shows up in the data, with mechanical boards scoring perhaps 10 to 15 percent higher for the same person. Technique and practice dwarf that margin. A player with butterfly control on a 15 dollar membrane board beats a lazy finger on a 200 dollar board every single time.
Hold a key down in Windows and the OS waits about 500ms. Then it fires a repeat event every 33ms, which is close to 30 per second. That behaviour exists for typing. It poisons speed tests.
A careless counter treats those repeat events as presses and happily reports 30 CPS for a single held key. That number is fiction. The ClackLab engine reads the repeat flag on every keydown event and drops the fakes. A held key scores exactly one press. If you see a CPS test reporting absurd numbers from holding, that test is broken.
Two techniques carry keyboard CPS past 10. Jitter clicking tenses the forearm and vibrates the finger against the key, good for 10 to 14 CPS in trained hands. Butterfly alternates two fingers on one keycap, and practiced users sustain 15 to 20. Both took over Minecraft PvP because server anticheat of that era flagged autoclickers but not fast fingers.
Be realistic about the cost. Jitter clicking loads the wrist tendons under constant vibration, and the repetitive strain injury reports from that community are real. If your forearm aches, stop. No CPS number is worth six weeks off a keyboard. Butterfly is easier on your hands anyway, since each finger works at half the rate.
Most people land between 4 and 6 CPS single finger, and the keyboard CPS test puts trained typists around 6 to 8. Anything over 10 is fast, and 12 plus requires a two finger technique. The honest comparison is your own score across weeks, since hand size and hardware shift the baseline.
Yes, by about 10 to 15 percent, because a 2mm actuation finishes each press sooner than a 4mm rubber dome. Technique decides far more than switch type does.
No. Repeat events are filtered before counting.
Use 5 seconds for burst speed and 60 seconds for endurance. Burst scores fall 30 to 50 percent over a full minute as the fingers tire, so the two numbers disagree in an informative way. Games reward both profiles, since twitchers need burst and grinders need endurance.
Related, not identical. A 40 WPM typist produces roughly 4 to 5 presses per second spread across many keys, while the keyboard CPS test measures one key under maximum attack. Strong overlap exists, but sprint typing spreads the load and this test concentrates it.
Speed on one key is one axis. The spacebar test isolates your thumb under the same scoring. NKRO checks whether your keyboard drops inputs when several keys land together. The reaction time test measures the half of the equation no click speed can fix.