Japanese Number Converter
Type any number and see it in kanji, hiragana, and romaji, with sound changes like さんびゃく and はっぴゃく handled for you. Free, no signup.
Whole numbers from 0 to 999,999,999,999.
How Japanese numbers work
Japanese groups large numbers by four digits instead of three. After 千 (1,000) comes 万 (10,000), then 億 (100,000,000): so 100,000 is not "one hundred thousand" but 十万, ten ten-thousands. Within each group of four you reuse the same digits with 十, 百, and 千.
A few combinations change sound to stay easy to say: 300 is sanbyaku, 600 is roppyaku, 800 is happyaku, 3,000 is sanzen, and 8,000 is hassen. The converter above applies every one of these changes for you, so what you see is exactly what a Japanese speaker would say.
Common numbers at a glance
| 1 | 一 | いち | ichi |
| 2 | 二 | に | ni |
| 3 | 三 | さん | san |
| 4 | 四 | よん | yon |
| 5 | 五 | ご | go |
| 6 | 六 | ろく | roku |
| 7 | 七 | なな | nana |
| 8 | 八 | はち | hachi |
| 9 | 九 | きゅう | kyuu |
| 10 | 十 | じゅう | juu |
| 100 | 百 | ひゃく | hyaku |
| 300 | 三百 | さんびゃく | sanbyaku |
| 1,000 | 千 | せん | sen |
| 8,000 | 八千 | はっせん | hassen |
| 10,000 | 一万 | いちまん | ichiman |
Keep going
Frequently asked questions
How do Japanese numbers work above 10,000?
Japanese counts in groups of four digits. 万 is 10,000, and 億 is 100,000,000, so one million is 百万 (a hundred ten-thousands). Inside each group, digits combine with 十, 百, and 千 just like small numbers.
Why is 300 sanbyaku and not sanhyaku?
Sound changes make some combinations easier to say: 300 sanbyaku, 600 roppyaku, 800 happyaku, 3,000 sanzen, 8,000 hassen. They are fixed and predictable, and this converter applies them automatically.
Why do 4 and 7 have two readings?
Four can be yon or shi, and seven can be nana or shichi. Modern counting mostly prefers yon and nana, partly because shi sounds like the word for death, so this tool uses yon and nana.
How do I say prices in Japanese?
Say the number, then 円 (en) for yen. A price of 480 yen is yonhyaku hachijuu en. Convenience-store prices are one of the fastest ways to practice numbers in real life.
What is the largest number this tool converts?
999,999,999,999, everything below one 兆 (trillion). That covers every price, salary, population, and news figure you are likely to meet.