Roofing Calculator is a free Android application that provides carpenters with all the information they need to make timber roofing structures. This easy-to-use tool allows users to input the pitch and run to instantly get information such as the rise of the common rafter per metre or foot of run, the length of the common rafter, the length of the hip, bevel angles including the seat and ridge for the rafter and hip/valley, and the jack rafter decrease based on industry standard centers. The app also allows users to input both IMPERIAL and METRIC units, and calculate using fractions of a pitch degree. With a big button number pad for ease of use, Roofing Calculator is an essential tool for carpenters involved in making timber roofing structures.