> is there a formula out there to compute date of a person's > death at age say 32 years 7 months and 3 days to get date of > birth > bob DETERMINING DATE OF BIRTH Bette Butcher Topp provided the following simple formula for determining a birthdate when you know the date of death and age. It's called "Formula 8870." Example: Died 6 May 1889 18890506 Age 71 years 7 mos. 9 days (subtract) - 710709 _________ 18179797 -8870 ________ 18170927