Roof Calculator is a calculator designed to help roofers. The program allows the calculation of four types of roofs: single-pitched, gable, attic and hip. Program functions: calculating the roof area, calculating the roof angle, calculating the length of the rafters, calculating the rows of rafters taking into account the pediment and overhangs, calculating the pitch of the rafters, calculating the number of rafters taking into account the given length of the edged board, calculating the sheathi