Easy Offset – Duct Calculator

Easy Offset is a professional HVAC duct offset calculator built for sheet metal workers, detailers, and installers who need speed and accuracy on the job. Unlike a standard calculator, Easy Offset eliminates the need for trig formulas, multipliers, or guesswork. Every tool is designed to reduce errors and improve reliability under pressure, so you can work faster, plan better, and order materials with confidence. Advantages • Faster than manual calculations • Improved accuracy and consistency • No trigonometry formulas or multipliers to remember • Fewer errors during duct installation • Improves planning and material orders Tools Included • Round Offsets – Two elbows at any angle, including rolling offsets • Laterals – Branch parallel or perpendicular to the main, with rolling offset option • Rolled Tees – One elbow, any angle • Rolled Nineties – Using any angle • Rectangular Offsets – Two radius elbows or two straight elbows • Rectangular Laterals – Parallel or perpendicular to the main, radius or straight elbows • Trigonometry Calculator – Quick triangle solutions, no formulas required • O*W/L Calculator – For mitered rectangular duct, more accurate than standard Offset × Width ÷ Length • Arc Length Calculator – Essential for large rolled fittings • Rectangular to Round Converter – Based on equal-friction method • Friction Loss Calculator – Reliable duct friction loss estimation Built for HVAC Tradesmen Easy Offset was developed specifically for heating, ventilation, and air conditioning (HVAC) work. It is trusted by sheet metal workers, mechanical contractors, and detailers who need reliable duct offset calculations on-site. Easy Offset gives you the accuracy and speed you need, without the errors you can’t afford.