what cousin percent dna match
Of course, we don't share that much DNA at that level, only .43% of our DNA matches each other (3rd cousins would be expected to share about .781%). My sisters are also well below the expected amount at .52% and .30% and my second cousin from this line shares only .31% with him.
In general you share an average of 50% less DNA with an ancestor with each additional generation. To calculate how much DNA you are likely to share with a cousin, you have to consider that they have also inherited 50% less DNA with each generation. This can be shown using a modified version of the genealogical relationship chart. For example, you and your relative share a common ancestor, Emmet Blacksheep.