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To calculate your paver joints refer to the image on the left. First measure out a square foot of your pavers. A square foot is 12 in X 12 in. Next, measure the length of your joints within the square foot. Add up all the linear inches, for this example (4X8) the average linear inches is 68. Now input the number you calculated (for me it was 68) into the "total length of joints in 1 square foot" section in the calculator below.