Chinese phrase
他多大了？ tā duō dà le
Meaning
How old is he?
When to use it
This is a casual way to ask how old a man is. It suits familiar conversation and sounds too informal for elders or formal settings.
Example dialogue
他看起来比我小，你知道他多大了？ tā kàn qǐ lái bǐ wǒ xiǎo nǐ zhī dào tā duō dà le
He looks younger than me. Do you know how old he is?
不知道，应该二十岁左右。 bù zhī dào yīng gāi èr shí suì zuǒ yòu
I don't know, but he is probably around twenty.