If you were born in 2004, you are 21 or 22 years old in 2026 (depending on whether your birthday has passed). Born in 2004 age: 22 years.
Born in 2004: you are 21 years old before your birthday in 2026, and 22 years old after. Generation: Generation Z.
If born in 2004, you are 21 or 22 years old in 2026.
Born in 2004: Gen Z.