Calculating Age from DOB

[roday]

I am trying to create a calculated column that will give me age by finding the difference between today's date and a date of birth. The difference is outputted in a timespan (ie. "6570.00:00:00") I need to convert this to years but everything that I try breaks the report. Any advice is greatly appreciated. Thank you.

[HighAley]

Hello.

We are using standard .Net Framework TimeSpan type.
Here is a description of custom format string.

Thank you.