Cousin Calculator
How are we related again?
This free cousin calculator helps you untangle family ties, from Great Uncle to Half 2nd cousins once removed. No more complicated charts—just pick a relationship, and our visual tool places you both on the tree. If you are still confused after that, just reach out!
Why Cousin Relationships Are So Confusing
Most people can name a first cousin without hesitation — but ask them about a "second cousin once removed" and watch the room go quiet. The confusion is real, and it's not your fault. The English language uses a surprisingly complex system to describe these relationships, and most of us were never formally taught it.
What "Removed" Actually Means
"Removed" simply refers to a difference in generations. If you and your cousin are in the same generation — both grandchildren of the same person — you're first or second cousins. If there's a generation gap between you, that's where "once removed," "twice removed," and so on come in.
Half Cousins and Step Cousins
DNA doesn't lie, but family trees can get complicated. Half cousins share only one common grandparent instead of two, which cuts your shared DNA roughly in half. This comes up frequently in adoptee searches and unexpected DNA match results.