Is per correct grammar?

"Per" is not grammatically correct as a standalone word. It is a preposition that needs to be used with another word to form a grammatically correct phrase.

Here are some examples of how to use "per" correctly:

* Per day: This means "each day" or "for every day."

* Per hour: This means "each hour" or "for every hour."

* Per person: This means "for each person."

* As per your request: This means "according to your request."

In general, "per" means "for each" or "according to."

Let me know if you have any other questions!