How old are you?
Meaning: This is a question asking someone how old they are. It's like saying, Can you tell me how old you are?
Choice of Words: How is used to ask a question about the manner or way of something. Old means having lived or existed for a long time. Are is a verb that describes a state of being or existence. You refers to the person being asked the question. When you put them together, "How old are you?" is a question asking someone to provide their age.
Alternative Expressions
Related Expressions