How old was c-3po in the 7 movie?

In "Star Wars: The Force Awakens" (Episode VII), C-3PO is approximately 50 years old. He was first activated during the events of "Star Wars: Episode I – The Phantom Menace," which takes place in 32 BBY (Before the Battle of Yavin). Given that "The Force Awakens" is set in 34 ABY, this makes C-3PO around 50 years old at that time.