Readability scores explained (and why grade 8 wins)

The readability number in our counter is Flesch Reading Ease, a formula from 1948 that still runs inside Word, Grammarly, and most editing tools. It looks at exactly two things: how long your sentences run, and how many syllables your words carry. Long sentences of long words score low. Short sentences of short words score high.

That sounds crude, and it is — the formula can’t tell elegant prose from word salad. But across millions of documents, the correlation holds: text that scores 60+ gets read, understood, and finished more often than text that scores 30.

How to read the number

90-100 reads like a children’s book. 60-80 is plain English — most bestselling fiction and successful web writing lives here. 40-60 is where academic writing and broadsheet journalism sit. Below 30 is contracts, insurance policies, and papers written to impress reviewers rather than inform readers.

The uncomfortable fact: the average American adult reads comfortably at about an 8th-grade level, and even highly educated readers prefer simpler text when they’re busy, tired, or on a phone — which is most of the time. Writing at grade 8 isn’t writing down to people. It’s removing friction for everyone.

How to raise your score without dumbing down

Split any sentence that makes you breathe in the middle. Swap latinate words for their short cousins — ‘use’ for ‘utilize’, ‘help’ for ‘facilitate’, ‘so’ for ‘consequently’. Cut qualifier stacks like ‘it is important to note that’. None of this touches your ideas; it just delivers them faster. Hemingway scored around 70. Nobody accused him of dumbing down.

Paste a paragraph into the counter above and watch the score respond as you edit. Getting from 45 to 65 usually takes ten minutes and makes every reader’s day slightly better.