Text & Word Calculators
Average Word Length Calculator
Calculate the average word length in characters for a piece of text, a signal of vocabulary complexity.
Caption Reading Speed Calculator
Check whether a video caption or subtitle displays at a comfortable reading speed based on character count and display duration.
Character Count Calculator
Count total characters with and without spaces, plus a breakdown of letters, digits, spaces, and punctuation for any text.
Dale-Chall Readability Calculator
Calculate the New Dale-Chall readability score and estimated grade level based on difficult words and sentence length.
Essay Pages to Words Calculator
Convert an essay page-count requirement into an estimated target word count based on font size and spacing.
Flesch Reading Ease Calculator
Calculate the Flesch Reading Ease score from words per sentence and syllables per word, with reading-level bands from 5th grade to college graduate.
Gunning Fog Index Calculator
Calculate the Gunning Fog Index grade level from sentence length and complex word density, a classic readability formula for technical writing.
Keyword Density Percentage Calculator
Calculate keyword density percentage for a piece of content and check it against commonly recommended SEO ranges.
Lexical Diversity Calculator
Calculate lexical diversity (Type-Token Ratio) of a text, measuring vocabulary variety versus word repetition.
Paragraph Count Estimator Calculator
Estimate how many paragraphs a piece of writing will contain based on total word count and average paragraph length.
Reading Time Calculator
Estimate silent reading time from word count using a 225 words-per-minute default, with the rate adjustable for faster or slower readers.
Sentence Length Calculator
Calculate average words per sentence, plus the longest and shortest sentence, to analyze the pacing and style of any text.
SMOG Index Calculator
Calculate the SMOG grade level from polysyllabic word count and sentence count, a readability formula built for health and safety materials.
Syllable Counter Calculator
Count total syllables, average syllables per word, and polysyllabic word count in any text using a vowel-group counting heuristic.
Teleprompter Scroll Speed Calculator
Calculate the required speaking pace (words per minute) to fit a script within a target presentation duration.
Text Expansion Translation Calculator
Estimate how much a piece of text will expand or contract in length when translated to another language.
Text-to-Speech Time Calculator
Estimate spoken delivery time from word count using a 150 words-per-minute default speaking rate, adjustable for faster or slower narration.
Transcription Time Calculator
Estimate how many hours manual transcription will take based on audio length and a standard transcription time ratio.
Typing Speed Calculator
Calculate gross and net words per minute from characters typed, time, and errors, plus a typing accuracy percentage.
Word Counter
Count words, characters with and without spaces, sentences, and paragraphs in any piece of text in a single pass.
Making Writing Measurably Clearer
Readability is not just a feeling — established formulas convert sentence length and syllable count into an actual reading-level score, the same math behind grade-level ratings on articles and textbooks. These ten calculators cover text analysis and readability math.
How the Flesch Reading Ease Score Works, Step by Step
- Count total words, sentences, and syllables across the passage being scored.
- Find average sentence length. Total words divided by total sentences — longer sentences push the score toward "harder to read."
- Find average syllables per word. Total syllables divided by total words — more syllables per word also pushes toward "harder to read."
- Apply the formula. Score = 206.835 - (1.015 × average sentence length) - (84.6 × average syllables per word). Higher scores mean easier reading: 60-70 is considered plain English, while 90-100 is very easy, and below 30 is roughly college-graduate level.
Run any passage through the Flesch Reading Ease Calculator directly, or check grade-level equivalents with the Gunning Fog Index Calculator.
Popular Text & Word Calculators
- Word Counter — counts words, characters, and paragraphs in a block of text.
- Reading Time Calculator — estimates time to read a passage based on average reading speed.
- Typing Speed Calculator — calculates words per minute from a typing test's time and accuracy.
Related: SEO Calculators for content-optimization-specific tools.