Calculated Dates of Birth

If a tombstone provides a date of death and an age at death, a date of birth can be calculated. When a date of birth is calculated in this fashion, make certain to indicate that the tombstone was the source and that the exact date of birth was calculated.

That way if better records of the date of birth are obtained that slightly differ, you will know that the “stone date” came from a date of death and an age–it is always possible that the person who determined the precise age did their math incorrectly or that the inscription was incorrect.

Always cite the source.