Generation Length Calculator
Calculate the average generation length in your family line and project ancestor birth years further back in time.
Inputs
Results
Avg Generation Length
30 years
Projected 5-Gen Ancestor Birth
1,630
vs. Historical Average5 years
Historical Era Code3
How to Use This Calculator
- Enter the Earliest Known Birth Year and Latest Birth Year across the family line.
- Enter the number of Generations Between those two birth years.
- Select the Line Type: paternal or maternal, as generation lengths differ between lines.
- Review Average Generation Length in years and how it compares to the historical average.
- Use Projected 5-Gen Ancestor Birth Year to estimate when to start searching for earlier records.
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