Those extra five seconds are exactly where fatigue starts to bite, so a strong score here proves you can hold a fast pace past the point most people begin to fade. Click as fast as you can for fifteen seconds and see your true average.
The five seconds that change everything
Ten seconds is the standard because it balances speed and stamina, but most people can just about hold their peak pace for its full length. Fifteen seconds removes that safety margin. The first ten feel familiar, and then you meet the part of the run where your hand quietly asks to slow down. How you answer that question, in those last five seconds, is what separates a good score here from a great one.
That makes the 15 second test a natural next challenge once your ten second number feels solid. It is long enough to expose a pace you were secretly borrowing against, but not so long that it becomes a pure endurance slog like the thirty or sixty second runs. It lives in the sweet spot where speed and stamina genuinely trade off.
Pacing a 15 second run
Open a fraction below your absolute maximum. A pace you can only hold for ten seconds will sag in the final third and drag your average down, whereas a rhythm you can carry all the way to fifteen keeps the number high. The best runs feel controlled at the start and only slightly harder at the end, rather than an all-out sprint that falls apart.
Keep your hand loose and let the motion come from the fingertip, not the whole arm, so you are not fighting tension as fatigue creeps in. Rest properly between attempts, because a tired hand starting a fresh run will fade even sooner. ClickStorm saves your best fifteen second result on your own device so you can watch it climb.
How it compares to nearby lengths
Slot the 15 second test between the ten second benchmark and the twenty second run. If your ten second score is strong but your thirty second score collapses, fifteen and twenty seconds show you exactly where the drop-off begins, which is useful for targeting your practice. Improving the length you fade at is how you lift every longer score.
For the whole range of durations in one tool, the CPS test hub covers one to one hundred seconds, while a technique like butterfly clicking, which is easy to sustain, often produces a better fifteen second average than a spiky method like jitter clicking. Try both and keep whichever holds up.
Frequently asked questions
What is a good 15 second CPS score?
Averaging 6 to 8 CPS across fifteen seconds is a strong result for most people, usually a touch below a ten second score because fatigue has five more seconds to work against you.
Is the 15 second test harder than the 10 second test?
Yes, slightly. The first ten seconds feel the same, but the final five fall past where most people can hold their peak pace, so keeping your speed up there is the real challenge.
Which technique suits a 15 second run?
A sustainable method like a relaxed regular click or butterfly clicking usually beats a spiky one like aggressive jitter clicking over fifteen seconds, because holding the pace matters more than a huge opening burst.
More click and reflex tests
Read the guides
How this test measures
Every number this page shows comes from one place, and the method behind it is written out rather than assumed. The click area counts a real mouse button press, the clock is the browser's monotonic performance timer, and your score is total clicks divided by the duration you picked. The exact conventions, including how the first click is treated and what the browser can and cannot measure accurately, are on the measurement methodology page.