How do you say i am thirteen years old in french?

The most common way to say "I am thirteen years old" in French is:

J'ai treize ans.

Here's a breakdown:

* J'ai - This means "I have."

* treize - This means "thirteen."

* ans - This means "years."

You can also use the word "âge" (age) and say:

J'ai treize ans d'âge.

This is a more formal way of saying it, but it's not as commonly used.