French phrase
Quelle est la capacité maximale de ~ ?
Meaning
What is the maximum capacity of ___?
When to use it
Asks how many people a place or facility can hold. It is polite, fairly formal, and calm.
Example dialogue
Quelle est la capacité maximale de cette salle ?
What is the maximum capacity of this room?
Elle peut accueillir au maximum 100 personnes.
It can accommodate a maximum of 100 people.