The Formula: example: died May 6, 1889, 71 yrs, 7 months, and 9 days. died: (05=May, 06= day of month) 18890506 subtract the time lived: (yrs,mos, days) -710709= 18179797 then subtract from that 8870 which equals date of birth: 18170927=Sept 27, 1817 ========================================== A URL that will do it for you: http://enws347.eas.asu.edu:8000/~buckner/bdform.html Vicki