Number to words

Convert a whole number into English and Japanese words at once.

Converted in this browser. Japanese omits the leading 一 before 十・百・千 (千二百, not 一千二百), matching standard writing.

How to use

  1. Type a whole number.
  2. Convert.
  3. Read the English and Japanese spellings.

What it supports

Whole numbers up to 15 digits, negative allowed. English uses short scale (thousand/million/billion/trillion/quadrillion). Japanese omits the leading 一 before 十・百・千 (千二百, not 一千二百). Decimals and fractions are not supported.

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