Easy Offset – Duct Calculator

Allen Sieler

In-app purchases

About this app

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.

Ratings and reviews

how many times do i have to pay ? it freezes up everytime i click on the app and i need to check if i have been charged multiple times ?

used it many times as long as you input the right information you get the right answers back

already purchased the app. won't let me fully use it wants me to upgrade the app even though I already paid for it

What’s new

Improved purchase detection so premium owners are never asked to pay again, plus a new Contact Support option.