How to say "calculator" in Japanese

• 電卓でんたくCommon
  nounThe everyday word for an electronic, typically pocket-sized calculator. Use this for the handheld device you do sums on; it is the default choice in most ordinary contexts.
  テーブルの上うえの電卓でんたくは私のですよ。↗

  The calculator on the table is mine.
• 計算機けいさんきCommon
  nounAlso means calculator, but with a more technical or formal nuance, and it can refer to a machine that computes generally, including computers. For the pocket device, 電卓 is usually the word you want.
  最初さいしょの電気でんき計算器けいさんきは１９世紀末せいきまつに出現しゅつげんした。↗

  The first electric calculator came into existence toward the end of the 19th century.

For the handheld electronic device, use 電卓; 計算機 also means calculator but sounds more technical or formal and can suggest a computing machine generally, so 電卓 is usually the safer everyday choice.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 電卓でんたくcalculator (electronic)
• 計算機けいさんきcalculator
• カリキュレータcalculator