How to say "calibre" in Japanese

• 口径こうけいCommon
  nounThe literal sense of 'calibre': the internal diameter of a gun barrel or the diameter of a bullet or shell. Use this only for that measurable physical dimension.
• 器うつわJLPT N1approx.Common
  nounThe figurative sense: a person's ability, capacity, or calibre, viewed as the 'vessel' that can hold talent or responsibility. Typical in statements about whether someone is equal to a role.
  彼かれは将来しょうらい国家こっかの棟梁とうりょうたるべき器うつわだ。↗

  He has the capacity to be a future leader of the nation.
• 器量きりょうCommon
  nounAlso figurative, covering a person's ability, capability, or calibre. Like 器, it evaluates personal worth or capacity rather than any physical measurement.

For the physical width of a gun barrel or bullet use 口径; for a person's ability or worth, choose between 器 and 器量, both metaphorical and near-synonymous.

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

• 口径こうけいaperture
• 器うつわability
• 器量きりょうability
• 器きability