This is unknown because in none of the series have any of the characters said how old they are.
ferb is eleven and Phineas is eight
Phineas and Ferb - 2007 Phineas and Ferb Get Busted 2-1 was released on: USA: 16 February 2009
approximately 11.
Phineas' mum married Ferb's dad who is English. Ferb was already born and had been living in England. Phineas and Candice had been living with their mum in America.
He doesn't play on Phineas and Ferb
ferb is eleven and Phineas is eight
Phineas and Ferb - 2007 Not Phineas and Ferb Phineas and Ferb-Busters 2-29 is rated/received certificates of: Australia:G
Candace is Phineas's sister. Ferb and Phineas are stepbrothers.
79
She is 15
8
Phineas (Vincent Martella) is 17 and Ferb (Thomas Sangster) is 19. But in the show they are probally 10 or 11.
7 years old.
There is a Phineas and Ferb game for the Wii: "Phineas and Ferb: Across the Second Dimension"
16
im pretty sure she is as old as phineas who it probably 9 or 10
Phineas and Ferb are how you spell "Phineas and Ferb".