Birth and Death Date Calculators

Online Birth Calculators

Name	Website	Description
Date Calculator: Add to or Subtract From a Date	Timeanddate.com	Can be used for calculating birth from tombstones or determining exact age of a person from birth date
Birth Date Calculator	longislandgenealogy.com	Used to help you calculate birth date when the tombstone only gives the date of death and the exact age
Tombstone Birthday Calculator	searchforancestors.com	Used to help you calculate birth date when the tombstone only gives the date of death and the exact age
Ancestor Search Age Calculator	searchforancestors.com	Used when you want to know how the exact age of a person from a birth date
Age Calculator	Rootsweb	Has various calculators to determine birth date and age

Calculating Birth Dates

Having birth dates for our ancestors helps us confirm our finds, as well as better identify them in other records. However, finding precise birth dates can be much more difficult as we research further back in time. We may only have our ancestor’s age (sometimes in the format of years/months/days) at time of death, or our ancestor’s age in another document. We may wish to know how old an ancestor would be from their birth date. Using a Date Calculator can help us with the addition and subtraction necessary to discover our a more precise date. The date calculators listed above can help you determine that information.

Records that may give an exact age at death and a death date can be found on:

Death records Grave markers (typically older markers)

Church records Obituaries