Ditch the bulky calculator! TradeCalc Pro is the essential all-in-one calculator for HVAC technicians and sheet metal fabricators. Effortlessly switch between dedicated HVAC and Sheet Metal modes to solve complex calculations on the job. Calculate fan laws, airflow, static pressure, and complex ductwork geometry with an intuitive, icon-based interface designed for speed and accuracy in the field. It's the only professional calculator you'll need in your pocket.