How do you say I agree in portuguese?

There are several ways to say "I agree" in Portuguese, depending on the context and level of formality:

Formal:

* Concordo. (Most common and neutral)

* Estou de acordo. (More emphatic)

* Tenho a mesma opinião. (Literally "I have the same opinion")

Informal:

* Concordo. (Still works well in informal contexts)

* É verdade. (Literally "It's true")

* Sim, claro. (Yes, of course)

* De acordo. (Okay)

* Pode ser. (Maybe)

Slang:

* Beleza! (Cool!)

* Tá certo. (Alright)

* Show! (Great!)

The best choice will depend on the situation and your relationship with the person you're talking to.