How Old Was Naruto Uzumaki In Naruto And Shippuden?
At the beginning of the Naruto series, he is around 11 years old. By the end of the Naruto series (not Shippūden), he is around 12 years old. By the beginning of Naruto Shippuden, he is 15 years old. By the end of the Naruto Shippuden series is around 17 years old. He is around 32 years old at the beginning of Boruto Naruto Next Generation.
https://www.guide4parents.com/naruto-shippuden-parents-guide-tv-series/