If you are wondering what relationship you share with your match, based on the amount of shared centimorgans (cMs) then try this great tool that automatically predicts the range of possible relationship based.

Gliesian’s autosomal predictor

Here is useful chart for figuring out what your relationship is with your cousins:

Cousin Relationship Calculator

Cousin Relationship Calculator

And here is the chart from ISOGG that gives percentages of shared DNA

ISOGG percentage chart

ISOGG percentage chart