If you can do something easily are said to be what?

If you can do something easily, you are said to be adept at it.

Here are some other words you could use:

* Skilled

* Proficient

* Expert

* Talented

* Gifted

* Able

* Capable

* Competent

* Fluent (if it's a skill like speaking a language)

* Natural (if you seem to have a natural knack for it)

The best word to use will depend on the specific context and the level of skill you want to convey.