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Flesch-Kincaid Content Readability Calculator

Marketing Content

Score content with Flesch Reading Ease, Flesch-Kincaid grade level, SMOG, Gunning Fog, and Coleman-Liau — with insights and CSV export. 100% client-side.

Content draft

Flesch-Kincaid readability lab

Score blog posts, newsletters, and landing pages with Flesch, SMOG, Gunning Fog, and grade-level metrics — entirely local, no uploads.
Flesch ease55.3

Fairly difficult

Grade level8.3

Middle school

Words44
Sentences4
73 syllables6 polysyllables (3+)11.0 words/sentence1 min read

Reading ease

Flesch score 55.3 — consider shorter sentences and simpler words.

Grade level

Estimated U.S. grade 8.3 — Middle school reading level.

Flesch Reading Ease

Higher is easier to read (0–100).

Fairly difficult

55.3

Flesch-Kincaid Grade

U.S. school grade level needed to understand the text.

Middle school

8.3

SMOG Index

Simple Measure of Gobbledygook — strong for polysyllabic copy.

High school

10.1

Gunning Fog

Years of formal education typically required.

High school

9.9

Coleman-Liau

Character-based grade level estimate.

College

14.4

Automated Readability

Character and word length based grade score.

High school

10.4

Syllable counts use English heuristics and may differ slightly from manual counts. Readability formulas are guides — audience, topic, and intent still matter more than any single score.