Inside Radius (Concave)

To calculate the radius of a concave wall you will need to know the width and the depth of the curve. Then use the radius calculator

Outside Radius (Convex)

To calculate the radius of a convex wall:

Run a string line parallel with the wall before the curve and extend it out to a point where it will intersect with a line from the opposite wall.

Measure the width between the strings at the point nearest the wall. Be sure that the distance from the ends of the measuring tape are equal distance from the intersection.

Measure the depth from the point at which the width measurement was taken to the intersection of the two string lines.

Enter the width and depth into the radius calculator

Dormer

To calculate the radius of a dormer you will need to know the width and the rise of the dormer. Then use the radius calculator to calculate the radius.