biết mấy
[ʔɓiət̚˧˦ məj˧˦]
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
(adverb) how (+ adj.)
AdverbRegister: informal
Where it’s used:
Used
Toàn quốc & hải ngoại · Vietnam-wide & diaspora
Examples
Khi đó mình từng nghĩ có nhiều tiền là một việc tốt biết mấy.At that time, I thought to myself how nice it would be to have a lot of money.
Wiktionary example (CC BY-SA 4.0)
Sources & notes
Imported from Wiktionary (CC BY-SA 4.0, retrieved 2026-07-29); community review pending. source ↗
Common questions
What does “biết mấy” mean?
(adverb) how (+ adj.)
Is “biết mấy” formal or informal?
biết mấy is generally informal.