The Duct Meter is a simple engineering tool to calculate air duct dimensions based on given inputs including air-flow, air pressure static loss (friction method) or air velocity (velocity method). This app was specifically designed with user satisfaction and usability in mind. This app is ready to get the job done anytime, anywhere. Duct size Calculations utilises long and tedious mathematical algorithms and can sometimes take up most of your day. That’s why we developed this calculator to allow you to focus more of your day on making money and less of it doing math. This app calculates the dimensions for both round and rectangular duct options. The output also includes air velocity when air static loss is an input (friction method) or it includes air static loss when velocity is an input (velocity method). This app includes two type ductulators. Classic cardboard style and modern one.