If you are currently 49 years old, you were born in either 1972 or 1971, depending on whether you have had your birthday this year yet. This calculation is based on subtracting your current age from the current year.
1963
49
49
If you were born in 1964 and its now 2013 you would be 48, but that's only if you haven't had your birthday yet if you have then you would be 49.
If now is 2010 you were born in:1986
If in April 2013, you were born in 2013 - 49 = 1964
2010 - 1961 = 49 Around 49
1963
49
It is 2015 now - so 49 years ago it was 1966.
49 years old
49
If you were born in 1964 and its now 2013 you would be 48, but that's only if you haven't had your birthday yet if you have then you would be 49.
If now is 2010 you were born in:1986
The year after 49 BC is 48 BC.
Age Now = Year Now - Year of Birth (if the person has had their birthday this year, and one less if they have not).
If it's the year 2009, the person would be 49 +/- 1 year depending on the month of birth.