: Calculating Fold Lines Based on Paper Thicknesses? I am wanting to know how do you calculate the curvature distance a fold line may produce based on paper thickness? For instance I am wanting

@Yeniel278

Length of a perfect circular fold for 180 degree turn is π × W:

    
    

Image 1 Corner shift

In practice thus you have some slack to the inner side, so W is actually width of paper plus how much inner radius you use. So W is somewhere between 1-2 times the width of the card stock. and the amount of paper that the corner eats is:

    
    π × 1-2 × w × a/180

where a is the angle of your corner, and w is the width of your cardstock. A value 2 might be pushing it i have never needed to measure card stock this accurately so i allays used a value of 1, but i do regularly accurate sheet metal work which is similar tech. So this is the theoretical underpinning.

Ultimately: Ask your printer.

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