くらい・ ぐらいabout; roughly
くらい after an amount makes it "about that much". ぐらい is the same word, and you can say either.
It is about a ten-minute walk to the station.
I bought about five apples.
How to form it
Amount + くらい/ぐらい
It goes after the number and its counter. English puts "about" in front.
To ask
どのくらい/どのぐらい
How long, how far, how much. どれくらい asks the same thing.
Saying roughly how much
It is about two kilometers from here to the sea.
This bag was about three thousand yen.
There are about twenty students in the classroom.
I run about three times a week.
When the amount takes a particle, it comes after くらい.
The meeting ended in about an hour.
It also softens. People add it even when they know the number, because an exact figure can sound blunt: 十分ぐらい待ってください, "wait ten minutes or so".
Asking: どのくらい
About how long does it take to get to Tokyo?
It is about two and a half hours by bullet train.
どのくらい doesn't say whether you mean time, distance or money. The rest of the sentence and the situation do. To pin it down, ぐらい goes after a question word: 何分ぐらい, いくらぐらい, 何人ぐらい.
How long have you lived in Japan?
About how many people are coming to the party?
三時ごろ, 三時間ぐらい
ぐらい is for an amount. For a point in time, such as a clock time or a date, "about" is ごろ.
In conversation you will also hear 三時ぐらい. The reverse, 三時間ごろ, is never said.
Three to learn whole
これくらいabout this much
Is this much all right?
Said while showing the amount. このくらい is the same.
同じくらいabout the same
This box is about as heavy as that one.
You'll also hear ほど and 約
Shop staff and announcements say ほど in the same spot. Writing and the news put 約 in front of the number.
Please wait about ten minutes.
It is about 500 meters from the station.
Close neighbours
くらい・ほどN3
After a whole clause, くらい isn't "about". It shows how far something went: so tired that you couldn't stand.
I was so tired that I could not remain standing.
Check yourself
1Which one fits?
毎日、
Choose an answer to see why.
2"About twenty people came."
Choose an answer to see why.
3"I'll be back in about ten minutes."
( )
Choose an answer to see why.
More detail
ぐらい turns up a little more in conversation.
Now and then it is written with its kanji: 一時間位.
More sentences
It is about fifteen minutes to the hotel by taxi.
That child is about five years old.
My father sleeps about seven hours every day.
That tree is about ten meters tall.
I waited at reception for about twenty minutes.
There were about forty participants.