How to say mathematical expression in Japanese

Here is a list of common mathematics notation in English and Japanese

Form English Japanese
A+B=CA+B=C A plus B equals C A 足す B は C
AB=CA-B=C A minus B equals C A 引く B は C
A×B=CA \times B=C A times B equals C A 掛ける B は C
A÷B=CA \div B=C A divides B equals C A 割る B は C
AB=CA^B=C A to the power B equals C
A raised to the Bth power equals C
A の B 乗は C
X2X^2 X squared X の二乗
X の自乗
X3X^3 X cubed X の立方
12\frac{1}{2} one-half 2 分の 1
23\frac{2}{3} two-third 3 分の2
14X5Y\frac{14X}{5Y} 14X over 5Y 5Y 分の 14X
A\sqrt{A} square root of A A の平方根
A の自乗根
A の二乗根
A3\sqrt[3]{A} third square root of A A の三乗根
A の立方根
X!X! factorial of X X の階乗
X\|X\| absolute value of X X の絶対値
lnX\ln X LN (or linn) X X の自然対数
logbXlog_bX log of X, base b ログ b の X
(x24x+9)dx\int (x^2-4x+9)dx integral of x squared minus 4x plus 9 x 二乗 引く 4x 足す 9 の積分
()() parentheses 丸括弧
[][] brackets 隅括弧


Variables (A,B,C,X,Y) are read as is (but in Japanese accent). A is エー (e-), B is ビー (bi-), C is シー (shi-), X is エックス (ekkusu), Y is ワイ (wai), etc


Most of the times using katakana version of English noun/verb is ok, for example:

  • It is common to hear プラス ++ and マイナス -
  • Integrals (\int) could be インテグラル (Integuraru) instead of the native Japanese (積分)
  • In programming and mathematics, equals (==) could be イコール

Happy learning!

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