Roof Area calculator.
This will provide an area calculation for clay or concrete roof tile, natural or composite slate, underfelt or breathable felt and ridge length.
Gable & Hip Roofs will have the same area provided that the pitch remains the same.
Roof A dimensions only will give you the area of a straight gable end or hipped roof.
Roof A & Roof B dimensions will provide the total exposed roof areas (the hidden area is subtracted from the total).
Enter the dimensions below, then click calculate to calculate the Area. Roof A and B can be calculated separately or together. There is a separate calculation at the right of the form for a simple "shed" roof.
The calculation of Roofs A and B require a gable height or fall to be entered. If you don't know these, but do know the pitch angle, then the fall can be calculated by selecting the nearest angle in the box below.