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Fry Readability Graph Calculator

Plots your sample on the classic Fry readability graph and returns the grade level region your text falls into.

When to use this

Use the Fry graph when teaching readability or evaluating K-12 reading material. The visual graph is excellent for showing students why both sentence length and syllable density matter, and it is still used in many US classrooms and reading-specialist certifications.

How it compares

Fry is a graphical version of the same inputs Flesch and Flesch–Kincaid use. Compared to Raygor, Fry uses syllables (more nuanced) where Raygor uses long words (faster). Use Fry for teaching; use FK for production scoring.

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How it works

Edward Fry's readability graph (1968) was designed for teachers to estimate the grade level of texts without complex math.

You count the average number of sentences and syllables per 100 words, then locate the point on his graph to read off a grade level.

This tool computes the point automatically and plots it on a digital version of the graph.

FAQs

Why does Fry plot on a graph?

Edward Fry observed that no single formula worked across grade levels. The graph captures the curved relationship between syllable density and sentence length.

Is Fry still used today?

Yes, especially in K-12 education. Fry remains popular for evaluating reading material in primary and secondary classrooms.

What two measurements does the Fry graph use?

It plots the average number of sentences per 100 words against the average number of syllables per 100 words, taken from several samples. Where those two values intersect on the graph indicates the approximate grade level.

How many samples does Fry recommend?

The standard method uses three 100-word passages from the beginning, middle, and end of the text, then averages them. Using a single short sample makes the grade estimate less reliable.

Worked example

Input

~100-word passage of news prose.

Output

Fry plot: ~6.5 sentences / 100 words, ~140 syllables / 100 words → Grade 8.

The Fry graph plots sentences-per-100-words against syllables-per-100-words. Most newspaper writing lands in the grade 7–9 zone in the middle of the chart.

Common pitfalls

  • Original Fry graph caps at grade 17; texts beyond this are placed in an "off-the-chart" region.
  • Requires three independent 100-word samples for a stable reading; a single sample can mislead.
  • Designed for narrative prose, not for tables, lists, or scripts.
  • The graph regions overlap; near boundaries, two close samples can land on different grades.

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