Flesch Reading Ease Score Calculator
Paste your text below to get an instant Flesch Reading Ease score out of 100 — plus the Flesch–Kincaid grade level. The higher the score, the easier your writing is to read. Free, no sign-up.
Everything is calculated in your browser — your text is never uploaded or stored. Aim for a Reading Ease of 60–70 for web content that most people can read comfortably.
What the Flesch Reading Ease score tells you
The Flesch Reading Ease score rates how easy a piece of writing is to read on a scale of 0 to 100. The higher the number, the easier the text. It was designed by Rudolf Flesch and is one of the most widely used readability tests in the world — built into word processors, content tools and government writing guidelines.
It works from two simple signals: how long your sentences are, and how many syllables your words have. Long sentences packed with long words drag the score down; short sentences and everyday words push it up. That makes it a quick, honest gut-check for whether your content is written for real readers or for a marking scheme.
How to read your score
- 90–100 — Very easy. Around 5th-grade level. Great for wide-audience content.
- 60–70 — Plain English. The sweet spot for most websites and blog posts.
- 30–50 — Difficult. Reads like a college text; fine for technical readers.
- Below 30 — Very difficult. Academic or legal register — simplify for the web.
Flesch Reading Ease — FAQ
What is a good Flesch Reading Ease score?
For general web content, aim for a Flesch Reading Ease score of 60–70 — that is plain English most adults can read comfortably. Scores of 90–100 are very easy (around 5th-grade level), while anything below 30 is difficult and reads like an academic or legal document.
How is the Flesch Reading Ease score calculated?
It uses the formula 206.835 − 1.015 × (words per sentence) − 84.6 × (syllables per word). Shorter sentences and simpler, fewer-syllable words push the score higher, meaning your text is easier to read.
What is the difference between Reading Ease and Flesch–Kincaid grade level?
Reading Ease gives a 0–100 score where higher is easier. Flesch–Kincaid grade level converts the same inputs into a US school grade — for example 8.0 means the text should be understood by an average 8th grader. This calculator shows you both.
Is this Flesch Reading Ease calculator free?
Yes. It is completely free with no sign-up and no limits. Your text is analysed entirely in your browser, so nothing you paste is uploaded or stored.
What is a Flesch-Kincaid Grade Level?
The Flesch-Kincaid Grade Level converts the same readability data into a US school grade level. A score of 8.0 means an average 8th-grade student (age 13–14) could understand the text. Most web content should aim for a grade level of 6–8 to reach the widest audience.
Does Flesch Reading Ease affect SEO?
Google has not confirmed readability as a direct ranking factor, but user experience metrics are. Content that is easy to read keeps visitors on the page longer, reduces bounce rates and earns more engagement — all of which signal quality to search engines. Aiming for a Flesch score of 60–70 is a practical sweet spot for most web content.
How do I improve my Flesch Reading Ease score?
Use shorter sentences, simpler words and active voice. Break long paragraphs into shorter ones, replace jargon with everyday language, and read your text aloud — if you stumble, your readers will too. This tool recalculates instantly as you edit, so you can see your score improve in real time.
The Flesch Reading Ease formula
The formula is straightforward: 206.835 − 1.015 × (words ÷ sentences) − 84.6 × (syllables ÷ words). It penalises long sentences and multi-syllable words. A text with short, punchy sentences and everyday vocabulary scores high (easy); dense academic prose with long sentences scores low (hard). The Flesch-Kincaid Grade Level uses the same inputs but outputs a US grade level instead of a 0–100 score.
Neither score measures whether your content is accurate, useful or well-structured — only how easy the surface-level language is to decode. Use it as a sanity check, not a quality metric: a 90-scoring paragraph of nonsense is still bad content, and a 40-scoring technical whitepaper may be perfectly appropriate for its expert audience.
Want to check more than readability? Try our readability checker, the word counter or browse all free SEO tools.