Simulate Second Parent Coordinates
Estimate the missing parent's G25 coordinates when you know the child and one parent.
This tool uses a simple model assuming the child's coordinates are the average of both parents, helping you generate a realistic second parent for analysis or simulation.
Formula: SecondParent = 2 × Child - KnownParent
Want the missing parent's full ancestry, not just coordinates?
This estimator returns a set of coordinates for the untested parent. The Second Parent Report turns that into a complete ancestry profile, with closest populations, an ethnicity breakdown and an AI interpretation in a PDF.