Number to Words Converter
Convert numbers to written-out words. Five formats including the standard check / legal "X and YY/100" form.
Why write numbers as words?
In financial and legal contexts, words are harder to alter than digits. A check or contract typically requires both: the numeric value AND the same value in words. If they disagree, most legal systems treat the words as authoritative because they're harder to forge.
Other contexts: formal writing (style guides recommend spelling out small numbers), tax forms that require a written-out amount, formal invitations (“the year two thousand twenty-six”), and legal documents in general.
Check writing: the "X and YY/100" format
Standard US check format puts dollars in words and cents as a fraction over 100. Examples:
- $5.00 → “Five and 00/100”
- $25.99 → “Twenty-five and 99/100”
- $1,234.56 → “One thousand two hundred thirty-four and 56/100”
- $1,000,000.00 → “One million and 00/100”
After writing the amount, draw a horizontal line through any remaining space on the line to prevent additions. The dollar amount in numerical form is repeated in the small box on the right side of the check.
Style conventions for written numbers
- Hyphenate compounds 21–99: “twenty-one”, “ninety-nine”.
- No "and" within whole numbers (US): “two hundred thirty-four” — not “two hundred AND thirty-four”. (British style does use “and”.)
- Use "and" only for the decimal point in check format: “...thirty-four AND 56/100”.
- Capitalize first letter when starting a sentence or for formal display. Body text in legal documents often uses Title Case for emphasis.
- Decimals in body text: “three point one four” or “three and fourteen hundredths” for precision.
When to spell out numbers
Most US style guides (Chicago, AP, APA) recommend:
- AP style: spell out one through nine, use numerals for 10 and above. Always spell out at the start of a sentence.
- Chicago style: spell out whole numbers from one through one hundred. Use numerals for 101+.
- Legal style: spell out and provide numerals: “one thousand dollars ($1,000)”.
- Scientific writing: numerals for everything (because measurements). “3 cm” not “three cm”.
Large number scale words
US (short scale, used in this calculator):
- thousand = 10³ (1,000)
- million = 10⁶ (1,000,000)
- billion = 10⁹ (1,000,000,000)
- trillion = 10¹²
- quadrillion = 10¹⁵
- quintillion = 10¹⁸
UK historically used “long scale” where billion = 10¹², but switched to short scale in 1974. Most of the world now uses short scale; some European countries (France, Germany, parts of Spanish-speaking world) still use long scale colloquially. For international financial documents, prefer numerals to avoid ambiguity.
Negative numbers and zero
Negative: prefix with “negative” or “minus” depending on context. Mathematical writing uses “negative” (negative seven). Accounting and finance use “minus” or simply parentheses around the numeral. Zero is just “zero” (or “nought” in British, less common today).
For other reference tools: Roman Numeral Converter, Title Case Converter, and Percentage Calculator.