Unfortunately, without more information about John, I cannot accurately determine his current age. It would depend on his birth date and the current date.
To calculate John's age, you would need to know his birth date and the current date. Subtract his birth date from the current date to determine his age in years.
Without knowing John's birth date, I cannot say for sure if he is older or younger than a certain age. However, if you provide his birth date and the age you are comparing to, I can calculate and determine the answer.
The average age of people named John would vary depending on the data set used. It could be calculated by finding the sum of the ages of all people named John and dividing by the total number of individuals in the data set.
I am a scientist, not a psychic, so I cannot estimate John's age based on characteristics alone. Age can vary greatly among individuals and cannot be accurately determined without more information.