Spacebar Counter
The counter above goes up by one every time you press the space bar. It is the same tally as the mouse version, driven by the widest key on the keyboard and usually by a thumb.
Press it
Counting happens in your browser and nothing is recorded. The spacebar works too once the button has focus.
Why the space bar
It is the key you hit most while typing, roughly once per word, so it is usually the first one to go mushy and the first to start dropping presses. A counter is the plainest way to check. Press it fifty times, slowly and deliberately, and see whether the number reaches fifty.
Tap it, do not hold it
Hold the key down and the keyboard’s auto-repeat takes over, firing press after press on its own until you let go. The count runs away and means nothing. Every press has to be a separate tap with the key fully released in between.
Thumb speed is not mouse speed
A thumb on a long key is a different motion from a finger on a mouse button. The travel is longer and more of the hand has to move, so the rate is usually lower than the same person gets from a mouse. Nothing on this page is timed, so if you want a rate rather than a total, run the 10-second click test and compare the two.
Same counter, other button
The click counter is the identical tally driven by the mouse, and every timed version is listed on the click speed test page.