The Ten Key Test, and How Keypad Speed Is Counted
The numeric keypad puts 7, 8 and 9 along its top row, the reverse of a telephone dial pad, and speed on it is quoted in KPH rather than WPM. Ten key work is a separate skill with its own home position, its own unit and its own failure modes, which is why data entry assessments score it in a column of its own.
The block, and the bump on 5
Almost every full size keyboard marks the 5 key with a raised dot or a short bar. That marking is the anchor for the whole block: the middle finger rests on 5, the index finger on 4, the ring finger on 6, and the hand finds every other digit by reaching one row up or one row down from there. The bump does the same job for the right hand that the notches on F and J do for touch typing in the letter block.
Two rows of reaches cover the rest. Index, middle and ring move up to 7, 8 and 9 and down to 1, 2 and 3, while the thumb keeps 0 and the little finger stays in the right hand column with Enter and the plus sign. Nothing in the block requires the hand to leave its position, which is what makes high sustained speeds possible without looking down.
KPH, and what it converts to
Keystrokes per hour is characters per minute multiplied by sixty. Since one word in a typing test means five characters, KPH divided by 300 gives WPM, and the same arithmetic works in reverse.
- 8 000 KPH is about 133 keystrokes per minute.
- 10 000 KPH is about 167 keystrokes per minute, or roughly 33 WPM.
- 12 000 KPH is 200 keystrokes per minute, or exactly 40 WPM.
Two details make keypad figures behave differently from letter figures. Numeric strings carry no redundancy, so nothing can be guessed from context the way a half typed English word can. And every field ends with Enter or Tab, so the little finger fires as often as any digit finger does. That is why a numeric score is often lower than the same person's prose score, and why the data entry test reports them apart.
One detail trips people up when they move between countries or between applications. The decimal key on the keypad does not always produce a full stop. On a German layout it sends a comma, because that is the decimal separator the language uses, and some accounting software overrides the key again to match the locale it was configured for. A number that arrives as 1,50 instead of 1.50 is not a typing error, and finding that out before an assessment saves an argument during one.
Enter with the thumb, or with the little finger
There are two schools. The traditional one keeps the little finger on the right hand column so that Enter, plus and minus are all reachable without moving the wrist. The other moves the thumb from 0 across to Enter, on the grounds that the thumb is stronger and the little finger is the slowest digit on either hand.
Both work. What does not work is switching between them at random, because the hand never builds a single reflex for the most repeated key in the whole task. Pick one, and keep 0 assigned to whichever digit is not doing Enter.
Checking that the block registers everything
A keypad that records nothing at all is usually not broken. Num Lock is off, and with the lock off the same physical keys send arrows, Home, End, Page Up and Page Down instead of digits. In the browser this is visible directly: KeyboardEvent.code reports Numpad4 either way, while KeyboardEvent.key switches between 4 and ArrowLeft depending on the lock state.
Real faults look different. A digit that needs a firmer press than its neighbours, one that occasionally does not appear, or one that appears twice from a single tap are three separate hardware symptoms, and none of them is a technique problem. The keyboard test shows each press and each repeat as it happens, so a suspect key can be confirmed in a few seconds rather than blamed for a bad score. Contamination under a keycap is a common cause, and cleaning the board sometimes settles it.
Practice for the keypad is best done on real material: invoice columns, meter readings, anything with a mix of lengths and a decimal point. Numbers you invent tend to fall into comfortable patterns, and comfortable patterns train the pattern rather than the hand.
When the digits have had enough, prose is a good way to let the right hand out of the block for a while. Jane Austen's drive into the park at Pemberley works well for that: 301 characters from Pride and Prejudice, published in 1813, built from one long clause after another, which rewards a steady rhythm rather than a burst. If you would rather stay with figures, Thomas Jefferson filled his Notes on Virginia of 1785 with river measurements, and two passages there are almost pure keypad work: the Great Miami at 496 characters and the Illinois with its two mile portage at 462. All three are waiting in the typing test, each with its author, year and source on its own page.