The test shows you a passage and starts the clock on your first keystroke — no countdown, no start button to fumble. Type the passage as it stands. Every character is coloured as you go: correct characters turn dark, mistakes are highlighted in place, so you can see an error at the position it happened instead of discovering it at the end. In 60-second mode the clock stops the test at a minute; in free mode you type until the passage is complete, however long that takes. Restart offers the same passage again or deals a new one — the passages are short original texts written for this tool, cycled in order.
The scoring uses the standard typing-test definitions, printed here so the number can be checked rather than trusted. A 'word' is defined as five characters, spaces included, which is what makes scores comparable between passages of different word lengths. Gross WPM is (characters typed ÷ 5) ÷ minutes: type 'hello world' — eleven characters — flawlessly in 30 seconds and the score is (11 ÷ 5) ÷ 0.5 = 4.4 gross WPM. Accuracy is stricter than it feels: a character counts as correct only if it matches the passage at the same position, so one missed letter shifts nothing but still costs every wrong position its point. Net WPM — the headline figure — is gross WPM multiplied by accuracy, which is the whole philosophy of the metric in one line: typing the same passage in 60 seconds with one wrong character scores a gross 2.2 but a net 2.0, because speed that produces errors is not speed a typist can use.
Use the score the way typing tutors do. Accuracy below about 95% means the honest fix is to slow down until the errors stop, then let speed rebuild on clean keystrokes — net WPM rewards exactly that order. Scores also move with the passage, the keyboard and the time of day, so compare your own runs against each other, not against a single internet figure: the often-quoted average for adults is around 40 WPM, with professional typists at 65–75, but those numbers come from longer, standardised tests. A one-minute run here is a measurement of today, on this passage — take three, and read the middle one.