His Age was 41-7-5

If you’ve been to old graveyards or looked at many death certificates you are accustomed to seeing ages listed this way.  It’s actually very helpful if the specific date of death is also recorded, as you then have the birth date as well.

I recently found this Windham NY gravestone listing:

             Sylvanus G. Miller, d March 13, 1860 aged 41y7m5d

Using the calculator, we can  assess that he was born Aug 8, 1818. 

So, yes, he should be included in his family’s 1820 census.   

Very helpful at times.

There are numerous online tools which will do that calculation for you such as the Tombstone Birthdate Calculator on Rootsweb. It looks like this: