One of the most important aspects of any roofing project is to determine the amount of roofing material you need. To do that, you need to know the area of your roof. But how do you measure the roof area using the plan dimensions and slope? This page will show you how to use a simple roof area calculator that can help you estimate your roofing needs in minutes. All you need are some basic measurements and a calculator. Whether you are planning to install a new roof, replace an old one, or repair a damaged one, this tool will help you save time and money by giving you an accurate estimate of your roof area.