Birth Date Calculator

This is a handy tool developed by Ben Buckner to help calculate birth dates from the death date and age at the time of death. Many old tombstones and death records list only these two facts and leave it to us to figure out the birth date. This does it with a simple keystroke or two. You must fill in all blanks for the "age" row. If you do not know the months or days, simply enter 0. If you believe you have found an error, please read this explanation on how the script works.

Birth calculation from age at death


Month Length:  

Enter date of death and age at death. 
Please note that all data fields must be filled. If you do not know, type a zero ( 0 ).

  Day Month Year
Date of death:
  Days Months Years
Age at death:
Date of birth:


Script by Ben Buckner

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