Number to Words Guide

Number to Words writes a number in Indonesian words. This can help when filling a draft invoice or checking how an amount sounds before you use it.

Try a whole number

Type 1250000 in Number. Under In words, you should see satu juta dua ratus lima puluh ribu. Read it in pieces: one million, then two hundred fifty thousand. Turn on Capitalise the first word if you need the line to start with Satu instead of satu. Use Copy to take the result.

Try a decimal

Replace the input with 12,5. The result should be dua belas koma lima. Here the comma marks the decimal part; the digits after it are read one by one. Do not type 1,250,000 as a thousands-grouped number: the tool uses comma or dot as a decimal marker, not as a grouping separator. Write 1250000 instead.

Check the result before printing

The tool writes number words; it does not add rupiah or decide a legal invoice format for you. For very large amounts, especially long numbers near the limit of JavaScript’s exact integers, compare against the original digits by hand. If it says the number is too large, do not shorten an invoice amount just to get an output.

Where your input goes

Processing runs in your browser. The tool does not upload your input to ilham.dev.

For more background, read Text Formatting and Cleanup.

Questions you might have

How is 1,250,000 read?: Enter 1250000 without separators. The output is satu juta dua ratus lima puluh ribu. Typing 1,250,000 is not the same input here: commas mark decimal digits, not thousands.
What about the number one?: In front of a scale word it shortens: 1000 is seribu and 100 is seratus, not satu ribu and satu ratus. Everywhere else it stays satu, as in satu juta.
How large a number can it handle?: The tool rejects an integer part longer than 16 digits. That length check is not a promise that every shorter integer is exact: JavaScript numbers can lose precision above 9007199254740991. Double-check large financial amounts before using the words.