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KeysInFlow

Typing Text Difficulty Analyzer

Inspect a passage before turning it into typing practice. This analyzer reports word count, average word length, symbol density, and a selected-letter density, then combines them into a score from 0 to 100.

The score is a heuristic built for this site, not a validated reading level or a measurement of your personal typing ability. The estimated time assumes a 40 WPM starting pace and reduces it using that score; 40 WPM is a model setting, not a measured population average.

Paste up to 20,000 characters. The analysis happens in this page; the tool does not upload or save the passage. Use custom typing practice to measure an actual attempt with the same text.

Analyze your text

0 / 20,000 characters

How the difficulty estimate works

The score weights average non-space characters per word at 40%, symbol density at 35%, and the density of selected letters at 25%. The letter set is j, q, x, z, v, k, w, y, f, and b. These are implementation choices, not research-established weights or a complete frequency model.

Scores below 20 are labeled easy, 20 to below 45 moderate, 45 to below 70 hard, and 70 or higher very hard. These labels describe this model only. The time estimate uses non-space characters in five-character units divided by the adjusted pace. It does not include time for planning, editing, or researching original writing.

Compare the estimate with a real copying attempt. Your familiarity with the language, keyboard, and passage can affect speed in ways the model does not measure.

Continue your practice

You can practice your chosen text, try a timed typing test. Choose the tool that matches the question you want to answer, and compare results under similar conditions.