Formal:
* Nasaan po ang banyo? (Na-saan po ang ba-nyo?) - This is the most polite and formal way to ask.
* Saan po ang banyo? (Sa-an po ang ba-nyo?) - A slightly less formal version.
Informal:
* Nasaan ang banyo? (Na-saan ang ba-nyo?) - This is more casual and suitable for friends or family.
* Saan ang banyo? (Sa-an ang ba-nyo?) - Even more casual.
You can also use these phrases:
* Paki-turo naman po ng banyo. (Pa-ki-tu-ro na-man po ng ba-nyo.) - "Could you please point out the bathroom?"
* May banyo po ba dito? (May ba-nyo po ba di-to?) - "Is there a bathroom here?"
Important Note: "Po" is a sign of respect used after verbs or at the end of sentences in Tagalog. It's generally considered polite to use "po" when speaking to elders or people you don't know well.