Free Online Readability Score Checker

About Readability Score Checker

The Flesch Reading Ease test is one of the oldest and most widely used readability formulas, scoring text from 0 to 100 based on average sentence length and syllables per word — higher scores mean easier reading. It's the same underlying formula Microsoft Word's readability statistics and many content tools use, calculated here entirely client-side using the standard published formula.

Paste in any text and get an instant score along with a plain-language label (Very Easy through Very Difficult) and an approximate U.S. grade level using the companion Flesch-Kincaid Grade Level formula. Both formulas are computed from the same underlying counts: total words, sentences, and syllables, estimated using a standard vowel-cluster syllable-counting heuristic.

This is useful for writers checking whether a piece matches its intended audience — marketing copy generally reads best around the 60-70 range (roughly 8th-9th grade level), while academic or technical writing can reasonably sit lower. Syllable counting is a heuristic estimate, not a dictionary lookup, so treat the exact number as a close approximation rather than a perfectly precise count.

How it works

1. Paste your text. Any article, email, or piece of copy.
2. Read the Flesch score. See your score and plain-language difficulty label.
3. Check grade level. An approximate U.S. school grade level equivalent.