What is the difference between "代える" and "換える"?

"代える" means "to replace, to substitute" (N3), whereas "換える" represents "to exchange, to replace (with something different), to convert" (N3).

Kanji Homophone Battle

Pronunciation Trap: "かえる (kaeru)"

Same sound, completely different Kanji! Choose the right conceptual writing.

Kanji Option A

かえる (kaeru)

N3 / CEFR

Kanji Option B

かえる (kaeru)

N3 / CEFR

In Japanese, many words share the exact same pronunciation "かえる (kaeru)" but are written with different Kanji, changing the meaning entirely.

代える (Level: N3): Translates to "to replace, to substitute" and is used when Often used for replacing one item or person with another, or making a change. Similar to 換える.
換える (Level: N3): Maps to "to exchange, to replace (with something different), to convert" and carries the nuance of Used when exchanging one item or type for another, or converting things like currency. Differs from 替える.

Mixing these up can easily result in unnatural writing. Look at the bilingual context cards below to master the conceptual boundaries!

Bilingual Context for "代える"

壊れた電池を新しいものに代えました。

I replaced the broken battery with a new one.

Bilingual Context for "換える"

空港でドルを円に換える。

I exchange dollars for yen at the airport.

Which Kanji perfectly fits this blank space?

Which Kanji perfectly fits the blank: "壊れた電池を新しいものに代えました。" (Meaning: "I replaced the broken battery with a new one.")

🎉 Correct Answer!

Correct! "代える" is used for "to replace, to substitute" in the context: "I replaced the broken battery with a new one.".