Grandparents Simulator - Genetic Ancestry Analysis

This tool estimates the average G25 coordinates of the unknown grandparents when you know the grandchild and one grandparent's coordinates.

Formula: OtherGrandparents = (Grandchild - Percent × KnownGrandparent) / (1 - Percent)

Default contribution is 25% (typical for one grandparent).

Please paste the grandchild's G25 scaled coordinates:

Please paste the known grandparent's G25 scaled coordinates:

Known grandparent contribution (%):

Choose a name for the result:

Result (average of other grandparents)

Simulate Grandparents Coordinates