Genealogy Calculators
Free genealogy calculators.
Count ancestors, estimate generation gaps, and understand DNA relationships.
Ancestor Count Calculator
Calculate how many direct ancestors you have at any generation. Great-grandparents, 5th great-grandparents — the numbers grow fast.
DNA Relationship Calculator
Calculate the expected percentage of DNA shared with a relative. From first cousins to half-siblings — understand genetic genealogy.
Generation Gap Calculator
Calculate the approximate birth year of an ancestor N generations back. Uses average generation length of 25-30 years to estimate when they lived.