How to say "maximum" in Japanese

• マックスCommon
  nounThe loanword, equivalent to English 'max'. Casual and conversational, it suits informal speech — turning the volume or power up to max — rather than formal or technical writing.
  乗のせられるのは１００キロがマックスです。↗

  A load of 100 kilograms is the max.
• 極度きょくどCommon
  no-adjective, na-adjectiveCovers 'maximum' in the sense of an extreme or utmost degree, typically of states like tension, fatigue, or nervousness; it stresses how far something has gone rather than a measured value.
  人間にんげんも極度きょくどに寒さむい温度おんどに対たいしては、防御ぼうぎょ装置そうちを備そなえている。↗

  Man, too, has been given protective devices against extreme temperatures.
• 最大限さいだいげんCommon
  no-adjectiveThe word for giving or doing something to the fullest extent — maximum effort, support, or use. It often works adverbially as 'to the maximum', focusing on the degree of an action rather than a value.
• 最大さいだいCommon
  no-adjectiveThe general term for the largest amount, size, or value; the natural choice in technical and statistical contexts such as maximum capacity, output, or number, and it also covers the senses 'biggest' and 'largest'.
  彼かれの最大さいだいの欠点けってんはしゃべりすぎることだ。↗

  His greatest fault is talking too much.
• 最高さいこうJLPT N3approx.Common
  no-adjective, na-adjectiveFundamentally 'highest'; as 'maximum' it applies to values at the top of a scale — the highest temperature, speed, or record — rather than to maximum amounts in general, where 最大 is the usual pick.
  株価指数かぶかしすうは過去かこ最高さいこうに上昇じょうしょうした。↗

  The stock price index soared to an all-time high.

For the largest amount or value use 最大; for the highest point on a scale, 最高; for doing something to the fullest, 最大限; for extreme states, 極度; and for casual spoken 'max', 「マックス」.

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

• マックスmax
• 極度きょくどmaximum
• 最大限さいだいげんmaximum
• 最大さいだいbiggest
• マキシマムmaximum
• 極大きょくだいmaximum
• 最大限度さいだいげんどmaximum
• 最大量さいだいりょうmaximum (e.g. dose)
• マクシマムmaximum
• 最大数さいだいすうmaximum number
• 最高さいこうhighest