How to say "precision" in Japanese

• 精度せいどCommon
  nounCovers precision as the degree of exactness or fineness of a measurement, instrument, or process — how precisely something works or is measured. This is the everyday word you will usually want.
  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.
• プレシジョン
  nounA loanword for precision, encountered in specialized fields such as engineering or marketing jargon. It is a less common way to say it than 精度, and seldom the word a learner needs in ordinary contexts.
• 適合率てきごうりつ
  nounThe technical term for precision in information retrieval and statistics: the proportion of retrieved results that are actually relevant. Use it only when discussing search performance or evaluation metrics, not general precision.
  適合てきごう率りつとは取り出とりだした記事きじのうち、どの程度ていどの記事きじが検索条件けんさくじょうけんに合あっているかを示しめす指標しひょうです。↗

  The precision ratio is an index that indicates how many articles meet the search criteria out of all of the articles retrieved.

Use 精度 for precision in the everyday sense of fine-grained accuracy of measurements or machines; 「プレシジョン」 is a rarer loanword alternative; 適合率 is the technical term for precision in information retrieval statistics.

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

• 精度せいどprecision
• プレシジョンprecision
• 適合率てきごうりつprecision