How to say "accuracy" in Japanese

• 精度せいどCommon
  nounAccuracy or precision in the technical sense: how exact a measurement, instrument, or set of data is. The common word for this sense and the usual first choice.
  今日きょうでは私わたしたちは天気てんきがどうなるかを高たかい精度せいどで当あてることができる。↗

  Today, we can tell how the weather will be with a high degree of accuracy.
• 正確度せいかくど
  nounAccuracy as a degree — how accurate something is, framed as something that can be stated or assessed. Less common than 精度, which is generally the word you want for this sense.
• 正確性せいかくせい
  nounThe quality of being accurate or correct — freedom from error in information, statements, calculations, or answers. A straightforward way to say 'accuracy' as a general property, though less common.
• アキュラシー
  nounThe English word 'accuracy' taken over as a loanword. It appears where English terminology is current, but for general purposes a native term such as 精度 is the usual choice.
• 正誤せいご
  nounPrimarily 'correct or incorrect; right or wrong' — the judgment of whether something is right, as in marking answers. Its 'accuracy' sense is marginal; it is seldom the word you want for accuracy itself.

Choose 精度 for the accuracy of measurements, instruments, or data; 正確度 or 正確性 for correctness as a degree or quality; 「アキュラシー」 as a less-common loanword; 正誤 for right-or-wrong rather than accuracy proper.

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

• 精度せいどprecision
• 正確度せいかくどaccuracy
• 正確性せいかくせいaccuracy
• アキュラシーaccuracy
• 正誤せいごcorrect or incorrect