How old do you have to be to be a knight?

Answer 1

If your actual question is ,"How old do you have to be in order to be a knight?", then I have an answer for you. I guess if you are imaginative, you could be a knight fighting an evil dragon in your mind, and you could do that at any age! But if you want the logical answer, you had to be a strong, tall man, which probably means he has to be young as well. So they would have to be at least in there 20's.

Answer 2

A noble boy began training for knighthood at 7-8 years old and would train until he was 21 when he became a knight. So the answer to your question is 21.