Free tool
Reading Age Checker
Paste any text. Get the reading age, grade level, and detailed analysis. Useful for teachers checking texts they're using and parents wondering if a book is right for their child.
How this tool works
The tool calculates four standard readability scores — Flesch-Kincaid Grade Level, Flesch Reading Ease, the Automated Readability Index, and Coleman-Liau Index — then averages them to estimate a reading age. Each score uses a slightly different formula based on sentence length, word length, and syllable count.
Reading age vs school year
A "reading age" is a rough estimate of the typical age at which a child can read text of that complexity comfortably. It's a useful guide but not a perfect measure — children's individual reading abilities vary widely, and texts with familiar topic vocabulary may read easier (or harder) than a generic readability score suggests.
Approximate UK school year mapping:
- Reading age 5-6: Reception / Y1
- Reading age 6-7: Y2
- Reading age 7-9: Y3-Y4 (LKS2)
- Reading age 9-11: Y5-Y6 (UKS2)
- Reading age 11-14: Y7-Y9 (KS3)
- Reading age 14+: KS4 / GCSE+
Limitations to know
Readability formulas measure surface features (sentence length, word length, syllables). They don't measure: vocabulary difficulty, conceptual complexity, narrative structure, dialogue, cultural references, or genre familiarity. A picture book about quantum physics could score "easy" but be conceptually hard. A complex sentence about a familiar topic could score "hard" but read easily for a fluent reader on that topic.
Use the score as a guide, then trust your own judgement about whether the text suits your child or class.
Privacy
Everything happens in your browser. The text you paste is never sent to any server, never stored, never logged. You can use this with sensitive material safely.