The short answer
APM can be calculated from content-free key-down counts. WPM cannot be calculated accurately without knowing something about the characters or words produced.
How KHYTHM calculates APM
KHYTHM groups key-down counts into natural calendar-minute buckets. A minute is active when it contains at least one key press.
Average APM
Total key presses ÷ active minutes. Quiet minutes with no keyboard activity are not included in the denominator.
Peak APM
The highest key-press count in one calendar minute. It shows the busiest recorded minute in the selected period.
APM includes editing keys, modifiers, shortcuts, navigation, and other recognized keyboard actions. It is an activity measure, not a typing-test score.
How WPM is different
Words per minute usually estimates how much text someone produced over time. Typing tests commonly derive it from characters or completed words, sometimes applying accuracy corrections.
That makes WPM useful for a controlled transcription test, but less suitable for everyday coding, editing, shortcuts, command-line work, design tools, or mixed keyboard activity. Those workflows contain meaningful key actions that do not map cleanly to words.
Why a private keyboard tracker uses APM
KHYTHM does not record typed text. APM fits that boundary because it requires counts and minute buckets, not characters, words, documents, passwords, or event sequences.
This lets the dashboard compare pace across days, typing sessions, apps, and keyboards while keeping the content of the work outside the statistics model.
See the complete list of Mac keyboard statistics or learn how the same content-free approach creates a keyboard heatmap.
How to interpret an APM number
Use APM to compare your own activity patterns under similar conditions. A higher value may reflect a dense typing burst, repeated shortcuts, navigation, or editing. A lower value may reflect reading, thinking, meetings, careful input, or time away from the keyboard.
APM does not measure quality, accuracy, focus, productivity, or the value of the work. Comparisons across different people, keyboard layouts, tasks, and workflows are usually less meaningful than trends within your own history.