New Video Reveals How Old Captain America Is At The End Of Avengers: Endgame

Wired has a new video focusing on how the visual effects were made for Avengers: Endgame, in which Marvel Entertainment Visual Effects Producer Jen Underdahl reveals that Captain America was 106 years old at the end of the film. Steve Rogers goes back in time to return the Infinity Stones but decides to stay in the past to live a life with Peggy Carter, passing the shield and title of Captain America to Sam Wilson.

A user on Reddit also figured out how Marvel arrived at the number 106:

Cap is born in 1920. He goes in the ice in 1945 (25 years old)
He is found in 2011 and lives on till 2023. (12 years)
This makes Cap (before he returned the stones) 37 years old.

This means he spends 69 years with Peggy. (106 – 37) Assuming he returned to Peggy in 1947, 2 years after the war ended, he would live till 2016 in alternate timeline. (2016 – 1947 = 69). 2016 is when Peggy died (in Captain America: Civil War)

This also proves that Cap returned to main timeline shortly before he time traveled for his dramatic entrance.