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Calcimator

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
  1. Enter the Earliest Known Birth Year and Latest Birth Year across the family line.
  2. Enter the number of Generations Between those two birth years.
  3. Select the Line Type: paternal or maternal, as generation lengths differ between lines.
  4. Review Average Generation Length in years and how it compares to the historical average.
  5. Use Projected 5-Gen Ancestor Birth Year to estimate when to start searching for earlier records.
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