🔤 Numbers to Words Converter

Spelling out a number is standard practice on bank checks, invoices, and legal or contractual documents. Digits alone can be altered with a single stroke (a "1" turned into a "4", a "0" into a "6"), but words require changing many characters at once, which is far harder to forge undetected. This tool converts a single number into English, Korean, Japanese, and Chinese simultaneously, which is handy for international paperwork or multilingual contracts.

English uses the short scale, introducing a new scale word every three digits: thousand, million, billion, trillion, and so on. For example, 1,234,567 is read as "one million, two hundred thirty-four thousand, five hundred sixty-seven". On checks, the convention is to capitalize the first letter of each word, drop the commas in favor of plain spacing, and append the cents as a fraction, e.g. "...and 00/100".

Korean money-writing groups digits into blocks of four, applying 만(萬)/억(億)/조(兆) at each 10,000× boundary, and within each block uses 천(千)/백(百)/십(十). In formal amount notation (checks, deeds), the digit "1" is always spelled out before 십/백/천 to prevent tampering — e.g. 100 → "일백", 1000 → "일천".


Example: 1,234,567 → "일백이십삼만사천오백육십칠" (123만 + 4567).

Like Korean, Japanese and Chinese also group digits in blocks of four, applying 万/億(亿)/兆 at each 10,000× step. The conventions differ slightly: Japanese follows natural spoken usage and omits "一" before 十/百/千 (e.g. 100 → "百", 1000 → "千"), while Chinese — especially in formal/financial notation — spells "一" explicitly to remove ambiguity (e.g. 100 → "一百"). Example: 1,234,567 is "百二十三万四千五百六十七" in Japanese and "一百二十三万四千五百六十七" in Chinese.

A digit can be altered with a single added stroke (1 into 4, 0 into 6, 6 into 8), making pure numerals relatively easy to forge. Spelling the amount out in words forces a forger to alter many characters consistently, which is far harder to do undetected. This is why checks, promissory notes, and notarized documents around the world require both a numeral and a written-out amount — and banking convention typically treats the written words as authoritative if the two ever disagree.

In China, the everyday numerals 一二三四五六七八九十百千 can be altered with a single extra stroke, so banks, contracts, and receipts are legally required to use the financial capital numerals 壹贰叁肆伍陆柒捌玖拾佰仟 instead. For example, the standard "一百二十三万四千五百六十七" becomes "壹佰贰拾叁万肆仟伍佰陆拾柒" in capital-numeral form. This tool shows both lines — standard, then financial capital numerals.

Type a leading "-" for negative numbers and each language's negative marker ("negative" / "마이너스" / "マイナス" / "负") is added automatically. Enter a decimal point and check "include decimal part" to spell out the cents/fractional digits in every language. Selecting a currency automatically appends the currency name and an "NN/100" fraction, ready to drop straight onto a check.