Formal:
* Ce sera: This is the most common and formal translation.
* Cela sera: This is a more formal alternative to "Ce sera" and is used when referring to a specific thing or idea.
Informal:
* Ça sera: This is a more informal version of "Ce sera."
* C'est: This is a very informal way of saying "that will be" and is often used in casual conversations.
Examples:
* Ce sera 10 euros. (Formal) - That will be 10 euros.
* Cela sera un plaisir de vous rencontrer. (Formal) - That will be a pleasure to meet you.
* Ça sera bien. (Informal) - That will be good.
* C'est tout. (Informal) - That's all.
The best translation for "that will be" will depend on the specific situation and the formality of the conversation.