Number to Words Converter
Convert any number into spelled-out words in English or Korean, from zero to the billions and beyond — runs 100% in your browser with no upload.
one thousand two hundred thirty-four
🔒 Converted in your browser — nothing is uploaded.
What this number-to-words tool does
Type any whole number and this tool instantly spells it out in words — for example 1234 becomes "one thousand two hundred thirty-four". It is the quick answer whenever you need the written form of an amount: filling in a cheque, drafting a contract or invoice, reading a figure aloud, or double-checking that a large number really says what you think it says. The converter follows standard American English grouping (thousand, million, billion, trillion and up), handles zero and negative numbers, and never inserts the word "and", so the result is clean and predictable.
English and Korean readings
The tool follows the language you are currently browsing in. In English you get the everyday spelled-out form. In Korean you get the Sino-Korean reading with the correct 만 / 억 / 조 grouping — so 1234 reads 천이백삼십사 and 10000 reads 만. A Format selector switches the output between a plain number, a currency amount (dollars and cents, or 원 and 전), and an ordinal (twenty-first, one hundredth, or the 제-prefixed Korean reading). Because everything runs as JavaScript in your own browser, conversion is instant and works offline once the page has loaded, no matter how big the number is.
Frequently asked questions
How large a number can it convert?
It handles every whole number that JavaScript can represent exactly — up to 9,007,199,254,740,991 — which comfortably covers thousands, millions, billions and trillions. Anything larger shows a gentle warning instead of an imprecise result.
Can it write ordinals like "twenty-first"?
Yes. Switch the Format selector to Ordinal and 21 becomes "twenty-first", 100 becomes "one hundredth", and 1234 becomes "one thousand two hundred thirty-fourth". In Korean the ordinal is the Sino-Korean reading prefixed with 제, so 1 becomes 제일.
Does it work with negative numbers and zero?
Yes. Zero is spelled "zero" (or 영 in Korean), and a negative number is prefixed with "negative" (or 마이너스 in Korean), for example -5 becomes "negative five".
Is anything I type uploaded to a server?
No. The conversion runs entirely in your browser with JavaScript. Nothing you enter is sent, stored or uploaded anywhere, so it is safe to convert any figure.