how to say how old are you in spanish

The most common way to say “How old are you?” in Spanish is:

• ¿Cuántos años tienes? – informal “you” (to friends, kids, people your age)
• ¿Cuántos años tiene usted? – formal “you” (to adults you respect, strangers in formal settings)

You can answer with:

• Tengo 20 años. – “I’m 20 years old.”