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Number to words converter

Convert a number into English words, or parse English number words back into digits — both directions, one box.

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Enter number

Result in words
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How it works

Two steps, no account

1

Pick a direction

Number to Words spells out a positive integer; Words to Number parses spelled-out English back into digits.

2

Type and convert

It converts automatically as you pause typing, or click Convert directly.

FAQ

Common questions

What formats does Words to Number handle?
Hyphens ("forty-two"), the word "and" ("one hundred and five"), and commas are all normalized before parsing, so most natural ways of writing a number in English work. Unrecognized words are skipped rather than causing an error.
How large a number can I convert?
Number to Words handles arbitrarily large positive integers up to quintillions, using JavaScript's BigInt internally so there's no floating-point rounding at large values.
Is my input sent anywhere?
No. The conversion runs entirely in your browser using JavaScript — nothing is transmitted, logged, or stored.
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Number to Words Converter

Convert numbers to their English word representation and vice versa. Useful for writing checks, legal documents, or learning English numbering.

How to Use

Number to Words

  1. Select "Number to Words" mode
  2. Enter a number in the input field
  3. Click "Convert" to see the result
  4. Copy the result to clipboard

Words to Number

  1. Select "Words to Number" mode
  2. Enter number words in the input field
  3. Click "Convert" to see the result
  4. Copy the result to clipboard

Features

  • Bidirectional Conversion: Numbers to words and words to numbers
  • Large Number Support: Handles numbers up to trillions
  • Multiple Formats: Accepts various word formats (hyphens, spaces, "and")
  • Copy Function: Quick copy to clipboard
  • Clear Option: Reset and start over

Examples

Number to Words

  • 1250 → "one thousand two hundred fifty"
  • 42 → "forty-two"
  • 1000000 → "one million"

Words to Number

  • "forty-two" → 42
  • "one thousand two hundred" → 1200
  • "five million" → 5000000

Use Cases

Financial Documents

  • Writing checks
  • Legal contracts
  • Financial reports

Education

  • Learning English numbers
  • Teaching number words
  • Math exercises

Content Creation

  • Writing formal documents
  • Creating educational materials
  • Number formatting