Why You Should Measure Readability
Before diving into the "how," let's briefly touch on the "why." Using the Flesch-Kincaid Grade Level (FKGL) formula isn't just about getting a good score; it's about empathy. It's about respecting your reader's time and cognitive energy.
Whether you are writing a blog post, a technical manual, or a legal contract, ensuring your content is accessible means your message actually lands.
Step 1: The Calculation (Manual Method)
While tools like CheckReadability.com do this instantly, understanding the math helps you write better.
- Select a sample: Choose a passage of at least 100 words.
- Count the sentences: Look for periods, question marks, and exclamation points.
- Count the words: Total number of words in the sample.
- Count the syllables: This is the tedious part, but crucial.
Then, plug it into the formula:
Where ASL is Average Sentence Length and ASW is Average Syllables per Word.
Step 2: Using Automated Tools
In the real world, you won't be counting syllables manually. Here are the best ways to get your score:
- CheckReadability.com: Our free tool gives you instant feedback and highlights complex sentences.
- Microsoft Word: Go to File > Options > Proofing and check "Show readability statistics."
- Hemingway Editor: A popular web app that highlights hard-to-read sentences in red.
Step 3: Interpreting Your Results
So you got a score of 10.5. Is that good? It depends on your audience.
Target: Grade 6-8
Ideal for general web content, marketing copy, and news articles. This is the "sweet spot" for maximum engagement.
Target: Grade 9-12
Acceptable for B2B white papers, technical documentation, and academic writing. Expect a more educated audience.
Step 4: Improving Your Score
If your score is too high, don't panic. Here is your checklist to fix it:
1. Shorten Your Sentences
This is the single most effective change. Look for "and," "but," or commas splicing two ideas together. Break them into two sentences.
2. Swap Complex Words
English is full of synonyms. Why use "utilize" when "use" works? Why use "facilitate" when "help" is clearer?
3. Use Active Voice
Passive voice often adds unnecessary words and complexity.
Passive: "The ball was thrown by the boy." (7 words)
Active: "The boy threw the ball." (5 words)
Pro Tip: Don't Game the System
Remember, the goal is clarity, not a perfect number. Don't make your writing sound robotic just to hit a Grade 5 level. Read it aloud. If it sounds natural, you're on the right track.