Numbers to Words Converter (en/jp) / Tool

How to use

This tool runs in your browser and converts Arabic numerals to English and Japanese numerals (Kanji).

• When numbers are entered, they are automatically converted.
• English upper limit: trigintillion = 10⁹³
• Japanese upper limit: 無量大数 = 10⁶⁸

The number of digits separating English and Japanese is different

English separates numbers by 3 digits.

Number	English
1	One
10	Ten
100	Hundred
1,000	One thousand
10,000	Ten thousand
100,000	Hundred thousand
1,000,000	One million
10,000,000	Ten million
100,000,000	Hundred million

Japanese separates numbers by 4 digits.

Number	Japanese	Pronunciation
1	一	Ichi
10	十	Juu
100	百	Hyaku
1000	千	Sen
1,0000	一万	Ichi Man
10,0000	十万	Juu Man
100,0000	百万	Hyaku Man
100,0000	千万	Sen Man
1,0000,0000	一億	Ichi Oku

Cheat sheet

10n	Japanese	English	SI prefix
103		thousand	K (kilo)
104	万
106		million	M (mega)
108	億
109		billion	G (giga)
1012	兆	trillion	T (tera)
1015		quadrillion	P (peta)
1016	京
1018		quintillion	E (exa)
1020	垓
1021		sextillion	Z (zetta)
1024	杼	septillion	Y (yotta)
1027		octillion
1028	穣
1030		nonillion
1032	溝
1033		decillion
1036	澗	undecillion
1039		duodecillion
1040	正
1042		tredecillion
1044	載
1045		quattuordecillion
1048	極	quindecillion
1051		sexdecillion
1052	恒河沙
1054		septendecillion
1056	阿僧祇
1057		octodecillion
1060	那由他	novemdecillion
1063		vigintillion
1064	不可思議
1066		unvigintillion
1068	無量大数
1069		duovigintillion
1072		tresvigintillion
1075		quattuorvigintillion
1078		quinquavigintillion
1081		sesvigintillion
1084		septemvigintillion
1087		octovigintillion
1090		novemvigintillion
1093		trigintillion