What it means
ぐらい indicates an approximate amount, number, time, or level, meaning “about” or “approximately.” It commonly follows a number with a counter or a noun that represents a rough standard. The estimate is not exact, and the surrounding sentence can be either familiar or polite without changing the meaning of ぐらい.
Usage note
ぐらい and くらい are both common forms with the same meaning. When ぐらい follows a clause, it can instead express an extent, as in “to the extent that,” so the surrounding context is important.
How to use it
彼は初心者ぐらいの知識しかありません。
He has only about beginner-level knowledge.
この薬は一週間ぐらいで効きます。
This medicine takes effect in about one week.
彼は初心者ぐらいの知識しかない。
He has only about beginner-level knowledge.
この薬は一週間ぐらいで効く。
This medicine takes effect in about one week.
Example sentences
駅から図書館まで歩いて十五分ぐらいかかります。
It takes about fifteen minutes to walk from the station to the library.
会議には二十人ぐらい参加する予定です。
About twenty people are scheduled to participate in the meeting.
この箱にはりんごが十個ぐらい入ります。
About ten apples fit in this box.
この薬は一週間