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Reading Level Calculator
Measure the grade level of any text with Flesch-Kincaid and reading ease scores.
TeachersFairly easy — clear to most readers. Counts: 45 words, 3 sentences, 62 syllables.
Choosing a text at the wrong level wastes a lesson: too hard and students stall on decoding, too easy and the lesson has no stretch. Paste a passage into this calculator and it measures readability with the two standard Flesch formulas, the Flesch-Kincaid Grade Level used across US education and the Flesch Reading Ease score, together with the word, sentence and syllable counts behind them.
How to use the Reading Level Calculator
- Paste the text you want to assess, at least a few sentences.
- Check the counts: words, sentences and syllables.
- Read the Flesch-Kincaid grade level and the reading ease score.
- Compare against the guide bands under the calculator to judge suitability.
Formula
Both formulas reward short sentences and short words. Reading Ease runs from about 0 (very difficult) to 100 (very easy); Grade Level maps to US school grades.
Worked example
A 120-word passage in 8 sentences with 156 syllables averages 15 words per sentence and 1.3 syllables per word. Grade level = 0.39 x 15 + 11.8 x 1.3 - 15.59 = 5.85 + 15.34 - 15.59 = 5.6, so about a 6th-grade level. Reading ease = 206.835 - 1.015 x 15 - 84.6 x 1.3 = 81.6, rated fairly easy.
Good to know
Readability formulas measure surface features only: sentence length and word length. They cannot judge background knowledge, text structure or motivation, and a passage full of short but technical words can score easier than it reads. Use the score as a screening tool when you assemble reading sets, then sanity-check with your knowledge of the class. For most general audiences, a grade level of 7-9 balances accessibility with substance; legal and academic texts routinely score 13 and above.
US grading scale reference
The table below is the US plus/minus scale used across this site. Where this tool offers other scales, the Canadian scale sets an A from 85% with a pass at 50%, and the Australian scale uses the bands HD (85%+), D (75-84%), C (65-74%), P (50-64%) and F (below 50%) on a 7.0 GPA.
| Letter grade | Percentage | GPA points |
|---|---|---|
| A+ | 97–100% | 4.0 |
| A | 93–96% | 4.0 |
| A- | 90–92% | 3.7 |
| B+ | 87–89% | 3.3 |
| B | 83–86% | 3.0 |
| B- | 80–82% | 2.7 |
| C+ | 77–79% | 2.3 |
| C | 73–76% | 2.0 |
| C- | 70–72% | 1.7 |
| D+ | 67–69% | 1.3 |
| D | 63–66% | 1.0 |
| D- | 60–62% | 0.7 |
| F | 0–59% | 0.0 |
Frequently asked questions
What grade level should classroom texts be?
Close to the grade you teach for independent reading, a level or two below for homework support, and at or slightly above grade level for guided reading where you can scaffold the hard parts.
How are syllables counted?
By vowel groups in each word, with standard adjustments for silent endings. Automated syllable counting is an estimate, so very short samples can be off by a few tenths of a grade.
What reading ease score is good?
Scores of 60-70 are plain English readable by most 13-15 year olds; 70-80 is fairly easy; below 50 is difficult and aimed at graduates. Newspapers typically sit around 55-65.
Why does my text score higher than expected?
Long sentences are the usual cause. Splitting two long sentences often drops the grade level by a full grade without changing a single word of vocabulary.
Is Flesch-Kincaid the same as a Lexile measure?
No. Lexile uses a proprietary model with word frequency data. The two correlate but are not interchangeable; Flesch-Kincaid is the open formula most word processors and this calculator use.
Go deeper
Prefer the full walkthrough? Read our guide: What Do Letter Grades Mean? — it explains the method step by step with more worked examples.
Sources & further reading
- College Board BigFuture — How to Calculate Your GPA on a 4.0 Scale — The most widely cited US reference for letter-grade to 4.0-scale conversion.
- National Center for Education Statistics (US Department of Education) — Official US education data on grading, attainment and outcomes.
Related tools
Last reviewed: November 2026. Results from this calculator are estimates based on the published scales above; your school's recorded grade is the official one.