If you’re trying to make your writing score higher on the Flesch-Kincaid scale, the goal is usually to increase sentence complexity and word complexity in a controlled, readable way. That means using longer sentences, more multisyllabic words, and a more varied structure without making the prose confusing.
The key is balance: a higher grade level score should come from intentional style choices, not from filler or jargon. Below is a practical guide to how to increase Flesch Kincaid Grade Level while keeping your writing clear, polished, and effective.
How do you increase Flesch Kincaid Grade Level?
To increase Flesch-Kincaid Grade Level, write longer sentences, use more complex vocabulary, and vary sentence structure so the text contains more syllables and more words per sentence. The score rises when reading demands increase, but the best results still sound natural and remain easy to follow for your intended audience.
What the Flesch-Kincaid Grade Level measures
Flesch-Kincaid Grade Level is a readability formula that estimates the U.S. school grade needed to understand a text. It is based mainly on two factors: average sentence length and average syllables per word.
In simple terms, the formula rewards text that is denser and more linguistically demanding. A higher score does not automatically mean better writing, but it can be useful when you need a more advanced reading level for academic, professional, or editorial purposes.
Why the score changes
- Longer sentences usually raise the grade level.
- More syllables per word also raise the score.
- Short, simple words tend to lower it.
- Frequent sentence fragments can reduce the score if they shorten the average sentence length too much.
Practical ways to raise the score
If your text is scoring too low, you do not need to make it awkward or stuffed with difficult words. The most effective approach is to increase complexity in ways that still feel deliberate and readable.
1. Use longer sentences with clear structure
One of the easiest ways to increase the grade level is to combine related ideas into longer sentences. A sentence with multiple clauses, modifiers, or a carefully placed dependent clause will usually score higher than several short, simple statements.
For example, instead of writing, “The plan failed. The team was unprepared,” you might write, “The plan failed because the team was unprepared, and the lack of preparation became obvious as soon as the deadline arrived.”
2. Replace simple words with more precise vocabulary
Choose words with more syllables when they fit the meaning. Words like investigate, significant, consequences, and determination generally raise the score more than shorter alternatives such as look into, big, results, and will.
That said, do not replace a clear word with a fancier one just to game the formula. Precision matters more than ornament.
3. Add modifiers and descriptive detail
Adjectives, adverbs, and prepositional phrases can increase sentence length and make the prose more layered. A sentence like “The committee approved the proposal” becomes more complex when expanded to “The committee reluctantly approved the revised proposal after a lengthy discussion.”
This technique works especially well in analytical, academic, or literary writing, where nuance matters.
4. Use subordinate clauses
Subordinate clauses are one of the strongest tools for raising the score because they naturally create more complex syntax. Words such as although, because, while, when, and since help build sentences that are grammatically richer.
Compare these two versions:
- “She left early. She was tired.”
- “Although she was tired, she left early because she did not want to miss the final train.”
5. Avoid oversimplifying with too many short sentences
Short, punchy sentences can be effective, but too many in a row will lower the grade level. If your draft reads like a list of basic statements, try combining related ideas and varying the rhythm.
That does not mean every sentence should be long. A mix of sentence lengths usually reads better than a wall of dense prose.
6. Use technical or academic language when appropriate
If your audience expects formal writing, terminology from the subject area can increase the grade level naturally. In scholarly or professional contexts, words such as methodology, interpretation, analysis, and framework are often more suitable than plain substitutes.
Use this carefully. Specialized vocabulary should serve the topic, not obscure it.
Step-by-step guide to revising for a higher score
The best way to increase Flesch-Kincaid Grade Level is through revision, not guesswork. Start with clarity, then adjust sentence length and diction until the text reaches the reading level you want.
- Draft the content normally. Focus first on meaning, not the score.
- Check the current readability. Use a readability tool to see your baseline.
- Identify short, simple sentences. Look for places where ideas can be combined.
- Replace basic vocabulary where appropriate. Choose more exact or more advanced terms.
- Add clauses and detail. Expand ideas with context, explanation, or qualification.
- Read aloud. Make sure the prose still sounds natural and controlled.
- Recheck the score. Revise again if the grade level is still too low.
What to avoid when trying to raise the score
It is possible to increase the grade level in ways that make writing worse. The formula may go up, but the text can become bloated, vague, or hard to read.
Do not add complexity without purpose
Long sentences that ramble do not improve writing quality. If a sentence becomes hard to track, break it apart or reorganize it so the logic is easier to follow.
Do not use obscure words just for effect
Unfamiliar vocabulary can raise the score, but it can also make your writing feel forced. Choose words that fit the tone, audience, and subject matter.
Do not sacrifice coherence
A higher grade level is only useful if the reader can still understand the message. Readability formulas measure surface features, not insight, argument quality, or style.
Examples of low-score and higher-score revisions
Seeing the difference in practice can help you revise more effectively. The goal is not to sound inflated, but to build sentences that are denser and more mature in structure.
Simple version
“The author explains the idea clearly. The chapter is easy to follow.”
Higher-grade version
“The author explains the idea with notable clarity, and the chapter remains easy to follow despite its layered discussion of the central argument.”
Simple version
“The company changed its policy. The staff had questions.”
Higher-grade version
“After the company changed its policy, the staff had several questions about how the new rules would affect daily operations.”
When a higher grade level is useful
Increasing the Flesch-Kincaid Grade Level makes sense in some contexts and not in others. Academic essays, formal reports, literary analysis, and professional documentation often benefit from a more advanced reading level.
By contrast, instructional content for general audiences, children’s writing, and consumer-facing copy usually works better at a lower score. The right target depends on who is reading and what they need from the text.
Good reasons to raise the score
- You are writing for an academic audience.
- You need a formal or professional tone.
- You want to reflect complex ideas more accurately.
- You are revising a text that sounds too basic for its purpose.
Final takeaway
To increase Flesch-Kincaid Grade Level, focus on longer sentences, more advanced vocabulary, and more complex syntax, but keep the writing clear and purposeful. The best revision strategy is to raise the reading level without losing control of tone, meaning, or flow.
If you want to keep improving your writing craft, you may also find these guides useful: how to write a personal narrative and how to format dialogue in a story.