Birthdate Calculator

Calculates birth date from death date and age of death in year-month-day format.
All dates according to the Gregorian calendar, with New Year on Jan. 1.

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BY: Ben Buckner
DATE:1996-06-28


 

You can also use the Rule of 8870

How do you figure a birthdate? Suppose the person died May 6, 1889, at the age of 71 years, 7 months, 9 days.

****Write the year, month, day as:->18890506
****Subtract the age at death:------->710709
****This gives the figure:--------->18179797
****Now subtract 8870:----------------->8870
****The result is:----------------->18170927

Year 1817, 9th month (Sept), 27th day or 27 Sept, 1817

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By Ben Buckner

Disclaimer: Although every effort has been made to ensure the accuracy and reliability of the information on The Olive Tree Genealogy pages, all transcriptions are subject to human error, and researchers should always check the original source of any list.



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