The Census Age Guage Calculator

Many early U.S. census records list only a person's age, not their exact birth date. For genealogists, that can make identifying the correct person a little tricky.

This Census Age Calculator helps estimate a likely birth year based on the age recorded in a census. By entering the reported age, researchers can quickly generate an approximate birth year — a helpful starting point when searching for earlier records.

Genealogy tool: Use the Free Census Age Guage Calculator to estimate a probable birth year from a recorded census age.

Estimate birth years using U.S. census records from 1790 to 1950, with calculators tailored to each census year’s unique enumeration date: