- Why five different scores instead of one?
- Because they measure slightly different things and disagree by design. Flesch Reading Ease and Flesch-Kincaid Grade Level weight sentence length and syllables per word — they're the dominant pair, used by US military procurement, Microsoft Word, and most state plain-language laws. Gunning Fog counts "complex words" (3+ syllables, excluding proper nouns and verb endings) — it punishes jargon harder. SMOG, designed in 1969 for healthcare materials, counts polysyllabic words across 30 sentences and is the gold standard for medical and consumer-safety writing. Coleman-Liau uses character counts instead of syllables, sidestepping the syllable-heuristic error that affects the other four. If all five agree, your estimate is solid. If one is an outlier, look at what it weighs differently — that's usually where your prose has a quirk.
- What grade level should I target?
- Depends entirely on audience. The American Medical Association recommends grade 6 for patient-facing healthcare materials. Most newspapers (NYT, WSJ, Guardian) sit at grade 9–12. "Plain language" guidance from the US government, the UK government, and most accessibility standards is grade 8. Mass-market fiction (Stephen King, John Grisham) ranges grade 7–10. Academic journals run grade 16–20. Legal contracts run 15–25 and that's a feature for the lawyers and a bug for everyone else. A useful rule: subtract two grades from your audience's actual education level. A college-educated reader processes grade 12 text as effortless; grade 16 reads as work; grade 18 reads as homework.
- How accurate is the syllable counter?
- It's a heuristic — counts vowel groups, strips silent trailing -e, preserves the "le" suffix as a syllable ("table" = 2, "candle" = 2), and floors at 1. It will disagree with a pronunciation dictionary on roughly 10% of English words: "fire" reads as 1 syllable when it's arguably 1.5, "every" reads as 3 when most speakers say "ev-ry" (2). This is why we report five metrics — Coleman-Liau ignores syllables entirely (it uses character counts), so it's a built-in sanity check. If Coleman-Liau and the syllable-based scores agree, the syllable count is fine. If Coleman-Liau is way off, the heuristic missed something — usually heavy use of an unusual word.
- Does the tool work on non-English text?
- Not well. All five formulas were calibrated on English (specifically, on US English in the 1940s–1970s for the original four; Coleman-Liau was 1975). Spanish, French, German, and other Latin-alphabet languages will produce numerical scores but the interpretation bands won't apply — Spanish has on average more syllables per word than English, so the same prose will score "harder" in Spanish without being meaningfully harder for a Spanish reader. There are language-specific readability formulas (Fernández Huerta for Spanish, LIX for Swedish/Danish/Norwegian) but they're not implemented here. For English, Romance-language loanwords are scored as they're written.
- How do I lower my reading level?
- Three levers, in descending order of effect: (1) Shorter sentences. Sentence length is the largest variable in four of the five formulas. Find every sentence over 25 words and split it. Look for "and," "but," "which," "that" — most are split points. (2) Shorter words. Replace Latinate verbs with Anglo-Saxon ones: "utilize" → "use", "facilitate" → "help", "demonstrate" → "show", "prior to" → "before". Each replacement drops the syllable count and trims the score. (3) Active voice. Passive constructions ("the report was reviewed by the committee") add words and abstract nouns; the active version ("the committee reviewed the report") is shorter and concrete. Combined, these three changes typically drop a 14 to an 8.
- Why does my writing read higher than I expected?
- Usually one of four things. First, long sentences — anything over 25 words pushes every grade-level formula upward fast. Second, abstract Latinate vocabulary — "organizational," "infrastructure," "implementation," "comprehensive" each count as 4–5 syllables and as complex words. Third, nominalization — turning verbs into nouns ("the formation of" instead of "forming," "the analysis of" instead of "analyzing") inflates word count and complexity. Fourth, parenthetical clauses — every clause separated by commas or em-dashes extends the sentence-length stat. If you write the way you'd brief a senior colleague verbally, your score usually drops 3–5 grades automatically.
- Is grade 6 actually easy to read?
- It's easier than grade 12, but "easy" doesn't mean "dumb." Plain English at grade 6–8 is what Ernest Hemingway, Cormac McCarthy, and most great journalism aim for. "For sale: baby shoes, never worn" is grade 1 and it's literature. "The cat sat on the mat" is grade 1 and it's children's writing. The grade level measures how much processing the average reader has to do per sentence, not how interesting or important the content is. Aiming for grade 8 doesn't mean writing like a textbook; it means writing the way a smart friend explains something at a bar, which most people can do, and most corporate communications are systematically prevented from doing.
- Why do my scores change a lot when I add or remove one sentence?
- Because the formulas are sensitive to sample size. SMOG was originally designed for 30-sentence passages; below 10 sentences it overreacts to a single long sentence. Flesch-Kincaid is more forgiving but still wobbles on 1–3 sentence inputs. For a stable, reportable score, paste at least 100 words across 5+ sentences. For a definitive score (the one you'd cite in a style guide), use 200+ words. The tool warns you below 20 words; below 50 words the scores are directional only.
- How does this differ from the existing Readability Checker?
- The Readability Checker reports two scores (Flesch Reading Ease + Flesch-Kincaid Grade) for a fast pass. The Reading Level Checker reports all five major formulas (FRE, Flesch-Kincaid, Gunning Fog, SMOG, Coleman-Liau), the underlying counts (words, sentences, syllables, complex words, polysyllabic words, letters), an averaged grade band, and the audience interpretation for each score. Use the Readability Checker when you just want a thumbs-up/thumbs-down. Use the Reading Level Checker when you're editing for a specific audience, debugging an unusually high or low score, or need to show your work in a style-guide review.
- Does the formula see emojis, code, or numbers as words?
- Numbers in digits ("42", "2026") are counted as words but contribute zero syllables — so they pull the average syllables-per-word down and make your text look easier than it reads. Emojis, code blocks, and URLs are skipped entirely (they don't contain any letters in the a–z range). For accurate scores on technical writing, strip code samples and replace numerals with words ("forty-two" instead of "42") before pasting. Or just accept that the score is directional and use it for trend tracking across edits rather than as an absolute number.
