Number to Words
Text ToolsConvert numbers to written English words for checks, legal documents, and anywhere a numeric value needs to be spelled out.. Free, private — all processing in your browser.
The Number to Words tool converts numeric values to their English word equivalent. Essential for writing checks (legal requirement in US: numeric amount must be matched by written words), legal documents (contracts often spell out amounts), formal correspondence, or any context needing readable number representation.
Enter any number — integer, decimal, or large (thousands, millions, billions) — and get the English word spelling. Supports currency format for checks (\\\"one hundred and 50/100 dollars\\\"), ordinals (first, second, third), and common number scales.
Number to Words — key features
Integer and decimal
Converts whole numbers and decimals.
Large numbers
Handles thousands, millions, billions, trillions and beyond.
Check format
Special format for writing checks including cents as fraction.
Ordinal numbers
1st = first, 2nd = second, etc.
Short scale
US/modern UK conventions (billion = 10^9).
Hyphenated compounds
Twenty-one, ninety-nine per English grammar rules.
Copy result
One-click copy.
Client-side only
All conversion in your browser.
How to use the Number to Words
- 1
Enter number
Any integer or decimal.
- 2
Choose format
Standard, check-writing, ordinal.
- 3
See words
English text equivalent.
- 4
Copy result
One-click copy to clipboard.
- 5
Use
In documents, checks, or formal writing.
Common use cases for the Number to Words
Financial
- →Check writing: Match numeric amount with written text on checks.
- →Invoice amounts: Total due in words for legal invoices.
- →Contract amounts: Purchase price or settlement amount spelled out.
Legal
- →Court documents: Damages, settlements in formal legal text.
- →Inheritance: Wills often specify amounts in words.
- →Real estate: Deed amounts written for certainty.
Education
- →Math homework: Reading numbers out aloud for problems.
- →Grammar practice: Students learning number-to-word conversion.
- →ESL practice: English learners spelling numbers.
Number to Words — examples
Small number
Simple.
42
forty-two
Large
Millions.
1234567
one million two hundred thirty-four thousand five hundred sixty-seven
Check amount
With cents.
$1,234.56 for check
one thousand two hundred thirty-four and 56/100 dollars
Decimal
Pi.
3.14
three point one four
Ordinal
Position.
21 (ordinal)
twenty-first
Technical details
Number to word conversion rules:
Small numbers (0-19): unique words
- 0: zero
- 1-9: one, two, ... nine
- 10-19: ten, eleven, twelve, thirteen, ... nineteen
Tens (20-99): tens prefix + ones
- 20-90: twenty, thirty, ... ninety
- 21: twenty-one (with hyphen)
- 99: ninety-nine
Hundreds (100-999): hundreds prefix + remaining
- 100: one hundred
- 101: one hundred one (or \\\"and one\\\" in British)
- 500: five hundred
- 999: nine hundred ninety-nine
Thousands (1,000-999,999):
- 1,000: one thousand
- 1,234: one thousand two hundred thirty-four
- 100,000: one hundred thousand
- 999,999: nine hundred ninety-nine thousand nine hundred ninety-nine
Millions, billions, etc.:
- 1,000,000: one million
- 1,000,000,000: one billion (US) — 10^9
- 1,000,000,000,000: one trillion (US) — 10^12
Note: UK short scale vs traditional long scale. In US and modern UK: million = 10^6, billion = 10^9, trillion = 10^12. Older British usage had different meanings.
Decimals:
- 3.14: three point one four
- 0.5: zero point five (or \\\"five tenths\\\")
- 123.45: one hundred twenty-three point four five
Check format (US):
Amount: $1234.56
Written: \\\"one thousand two hundred thirty-four and 56/100 dollars\\\"
The \\\"56/100\\\" notation for cents is standard on checks. Full written form: \\\"...and fifty-six cents\\\" also acceptable.
Ordinals:
- 1st: first
- 2nd: second
- 3rd: third
- 4th-19th: fourth, fifth, ... nineteenth
- 20th: twentieth
- 21st: twenty-first
- Rules for combining ordinals with cardinals in hundreds/thousands.
Large numbers scale:
- Thousand (10^3)
- Million (10^6)
- Billion (10^9)
- Trillion (10^12)
- Quadrillion (10^15)
- Quintillion (10^18)
- Sextillion, septillion, octillion, nonillion, decillion...
For scientific notation, \\\"ten to the twenty-third\\\" or similar may be used.
Conversion is deterministic; follows systematic rules. No cultural variation except short/long scale for billion+.
Common problems and solutions
⚠Billion confusion
US billion = 10^9. Old British billion = 10^12 (now obsolete). Modern English uses short scale (US definition) for billion.
⚠Check writing legal
Different countries have different check requirements. Some require \"and\" between hundreds and tens/ones. Follow your country convention.
⚠Hyphenation rules
Twenty-one has hyphen. Two hundred has no hyphen between hundreds and tens. Follow grammar rules strictly.
⚠Decimal precision
Long decimals produce long word strings. Practical limits on readability; technical documents may stay numeric.
⚠Negative numbers
Usually prefixed \"negative\" or \"minus\". \"-42\" = \"negative forty-two\".
⚠Zero handling
Some contexts drop leading zero: \"one half\" vs \"zero point five\". Both valid.
⚠Very large numbers
Beyond trillions, many aren’t commonly known. Most English speakers know up to trillion. Beyond that use scientific notation in speech.
Number to Words — comparisons and alternatives
Compared to manual spelling, this tool avoids errors for large numbers. Manual works for small numbers.
Compared to check-writing services, this tool is free and private. Services charge; this tool is instant.
Compared to Word\u2019s spell-out feature, this tool works standalone. Same result without needing Word.
Frequently asked questions about the Number to Words
▶How do I write a check amount in words?
Write dollars and cents: \"one hundred fifty and 50/100 dollars\" for $150.50. The cents appear as fraction over 100. Check format is legal requirement for check cashing.
▶How many zeros in a billion?
Modern usage: billion has 9 zeros (10^9 = 1,000,000,000). Older British billion had 12 zeros. Modern US and UK use short scale: billion = 10^9.
▶What’s the difference between cardinal and ordinal?
Cardinal = counting (one, two, three). Ordinal = position (first, second, third). 5 becomes \"five\" or \"fifth\" depending on context.
▶Should I hyphenate numbers?
Compound numbers 21-99 use hyphens: twenty-one, forty-seven, ninety-nine. 100s, 1000s don’t: two hundred (no hyphen). Basic rule for formal English.
▶Is my data private?
Yes. All conversion in your browser.
▶Can I convert scientific notation?
Tool handles decimal form. Convert scientific (1e6) to standard (1000000) first. Then to words.
▶Do I include \"and\" after hundreds?
American English: often omit (\"one hundred twenty-three\"). British English: include (\"one hundred and twenty-three\"). Both correct; follow context.
▶What about commas?
Written amounts usually don’t need commas: \"one thousand two hundred thirty-four\" not \"one thousand, two hundred, thirty-four\". Numeric form uses commas (1,234).
Additional resources
- English numbers — Comprehensive English number spelling rules.
- Long and short scale — Billion/trillion conventions across English.
- Check writing guide — How to write a check correctly.
- Ordinal numbers — First, second, third and ordinal patterns.
- Grammar rules — Hyphenation rules for compound numbers.
Related tools
All Text ToolsAngle Converter
Convert angles between degrees, radians, gradians, arcminutes, and arcseconds with instant results and precise calculations.
Discount Calculator
Calculate sale price, discount amount, and total savings with support for percentage-off, dollar-off, and stacked discount scenarios.
Length Converter
Convert lengths and distances between metric and imperial units including meters, feet, inches, miles, kilometers, and yards.
Number Base Converter
Convert numbers between binary, octal, decimal, hexadecimal, and any base from 2 to 36 with clear step-by-step output.
Percentage Calculator
Calculate percentages, percentage change, increase or decrease, and reverse percentages with step-by-step working shown.
Roman Numeral Converter
Convert Arabic numbers to Roman numerals and vice versa. Handles any number from 1 to 3999 with proper notation.
Learn more
Explore more tools
200+ free tools that run in your browser.
Browse all tools →