Cousin Calculator
To determine a
relationship between two individuals,
put the common ancestor on row 0 and column 0.
List each descendant on their row or column. Where they meet is the relationship.
C = Child or Cousin, CA = Common Ancestor, G =
Grand, GG = GreatGrand,
N = Niece or Nephew, R = Number of times removed, S = Sibling.
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | |
| 0 | CA | C | GC | GGC | 2GGC | 3GGC | 4GGC | 5GGC | 6GGC | 7GGC | 8GGC |
| 1 | C | S | N | GN | GGN | 2GGN | 3GGN | 4GGN | 5GGN | 6GGN | 7GGN |
| 2 | GC | N | 1C | 1C1R | 1C2R | 1C3R | 1C4R | 1C5R | 1C6R | 1C7R | 1C8R |
| 3 | GGC | GN | 1C1R | 2C | 2C1R | 2C2R | 2C3R | 2C4R | 2C5R | 2C6R | 2C7R |
| 4 | 2GGC | GGN | 1C2R | 2C1R | 3C | 3C1R | 3C2R | 3C3R | 3C4R | 3C5R | 3C6R |
| 5 | 3GGC | 2GGN | 1C3R | 2C2R | 3C1R | 4C | 4C1R | 4C2R | 4C3R | 4C4R | 4C5R |
| 6 | 4GGC | 3GGN | 1C4R | 2C3R | 3C2R | 4C1R | 5C | 5C1R | 5C2R | 5C3R | 5C4R |
| 7 | 5GGC | 4GGN | 1C5R | 2C4R | 3C3R | 4C2R | 5C1R | 6C | 6C1R | 6C2R | 6C3R |
| 8 | 6GGC | 5GGN | 1C6R | 2C5R | 3C4R | 4C3R | 5C2R | 6C1R | 7C | 7C1R | 7C2R |
| 9 | 7GGC | 6GGN | 1C7R | 2C6R | 3C5R | 4C4R | 5C3R | 6C2R | 7C1R | 8C | 8C1R |
| 10 | 8GGC | 7GGN | 1C8R | 2C7R | 3C6R | 4C5R | 5C4R | 6C3R | 7C2R | 8C1R | 9C |
For Example: John had a son Peter
who had a son Paul (across the rows).
John also had a son Robert who had a daughter Jane (down the columns).
| 0 | 1 | 2 | |
| 0 | CA=John | C=Peter | GC=Paul |
| 1 | C =Robert | S | N |
| 2 | GC=Jane | N | 1C |
Therefore, Paul and Jane are first cousins
(1C)!
Also, Robert and Peter are siblings (S).
Paul is Robert's nephew (N) and Jane is Peter's neice (N).
| Page updated: 12-27-2000 |