How to Read Your Readability Score and Actually Use It
By the Super Simple Digital Tools Team · Updated June 2026 · Text & Developer
A readability score is only useful once you know what it is reacting to. Both the Flesch Reading Ease and Flesch-Kincaid Grade Level formulas look at exactly two things: how long your sentences are and how many syllables your words carry. They do not read meaning, check facts, or notice structure. That narrow focus is a strength for quick editing, because it tells you precisely which mechanical levers to pull, but it also means the score should sit alongside human judgement rather than replace it.
Start by matching the number to your audience. The reading-ease bands are a helpful map: 90 to 100 is very easy (around 5th grade), 60 to 70 is plain English (8th to 9th grade), 30 to 50 reads at college level, and anything below 30 is genuinely hard going. A how-to article for a general audience that scores 45 is a signal to simplify, while a research summary for specialists may legitimately sit lower. There is no universally correct target, only a target that fits who is reading.
When you want to raise the score, sentence length is the fastest lever. Long sentences inflate the words-per-sentence input in both formulas, so finding the longest sentences and breaking them at natural joins, often where you see a comma plus an 'and' or a 'which', produces an immediate jump. Read your draft and flag anything past roughly 25 words; many of those can become two cleaner sentences without losing a single idea.
The second lever is word choice. Multi-syllable words push up the syllables-per-word input and weigh especially heavily on the reading-ease score. Swapping 'utilise' for 'use', 'approximately' for 'about', and 'in order to' for 'to' lowers syllable density and tightens the prose at the same time. You do not have to ban every long word; specialist terms your readers expect can stay. The goal is to remove the long words that add length without adding meaning.
Finally, use the score as a before-and-after check, not a single verdict. Run your draft, make a focused pass on the longest sentences and the heaviest words, then run it again to see the movement. Because the analysis happens instantly in your browser, you can iterate as many times as you like on private drafts. Aim for a score that fits your readers, confirm the writing still sounds natural when read aloud, and ship it.
Quick tips
- Check the score after editing, not before, so you can see whether your sentence and word changes actually moved the number.
- Treat 60 to 70 reading ease as a default web target, then adjust up for general audiences or down for technical readers.
- Hunt for sentences over about 25 words first; splitting them gives the biggest score gain for the least effort.
- Read suspect passages aloud, since the formulas miss clarity and flow that your ear will catch instantly.
The Readability Score Checker is free to use as often as you like — no signup required.