The link below is a crown moulding angle/bevel calculator.
Me personally I put the crown upside down on my saw (the portion of the crown that goes on the wall goes on the fence. The top part of the crown is on the table). If you cut the first piece of crown this way you can use that compound cut to line up your angle/bevel.
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This content was originally posted on Y! Answers, a Q&A website that shut down in 2021.