French phrase
Combien faut-il de ~ ?
Meaning
How many ___ are needed?
When to use it
Asks about the required amount or number. It is useful for checking requirements such as credits or paperwork.
Example dialogue
Combien faut-il de crédits pour valider le semestre ?
How many credits are needed to complete the semester?
Il en faut trente pour le semestre.
Thirty are needed for the semester.