ENERGY STAR’s Roofing Comparison Calculator is equipped with a user-friendly functionality that anyone on the building team can use with ease. Developed by the U.S. Environmental Protection Agency as part of its mission to accelerate the market penetration of energy-efficient building technologies, the calculator analyzes several key variables, and is a highly recommended exercise when contemplating a change from a black roof system to an ENERGY STAR-rated white one, or determining the savings when considering among alternatives on a new building.