Cousin Relationship Calculator

Determine the exact cousin degree and removal between two people based on their common ancestor.

Person A Generation

Person B Generation

Common Ancestor Generation

Tab to move between fields

Cousin Degree

Times Removed

Generation Gap1

Relationship Code2

Est. Shared DNA %3.13%

How to Use This Calculator

Enter Person A's Generation and Person B's Generation (counting down from a common ancestor).
Enter the Common Ancestor Generation to establish the shared lineage point.
Review the Cousin Degree (first, second, third cousin, etc.) and Times Removed.
Check the Estimated Shared DNA percentage to calibrate DNA match expectations.
Use the Relationship Code to explain relationships accurately in family history narratives.

How the result changes with Person A Generation

Person A Generation: Generation number of Person A (1=the common ancestor's children)
Person B Generation: Generation number of Person B (1=the common ancestor's children)
Common Ancestor Generation: Generation number of the most recent common ancestor (0=the ancestor themselves)

Identify Input Parameters
Person A Generation = 4, Person B Generation = 5, Common Ancestor Generation = 2 = 3 input(s) provided
Calculate Cousin Degree
Cousin Degree
1 = 1
Calculate Times Removed
Times Removed
1 = 1
Calculate Generation Gap
Generation Gap
1 = 1
Calculate Relationship Code
Relationship Code
2 = 2

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