Calculate Birthdate from Tombstone Death Data

Often, tombstones will list only a date of death and an age at death in days, months and years.

This calculator will give you the date of birth if you enter the date of death and age.

Enter date of death and age at death:

	Day/s	Month/s	Year/s
Death:		Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Age:

 

Then click on the Calculate Birthdate button below.

Born:

 

While the calculator will give you an accurate date of birth based on the date of death and age, don’t be misled into thinking that the calculated correct answer is the actual date of birth.  Stone carvers used several indirect methods to calculate the age from date of birth and many of these methods – such as the Rule of 8870 – sometimes gave dates slightly different from the actual birth date.