DuctPro: Duct Size Calculator
Duct Sizer & Static Pressure
About
Calculate ductwork sizes instantly for various shapes including round, rectangular, flex, and flat-oval. Track static pressure per job and generate client-ready PDF schedules. Works offline and supports both imperial and metric units.
What's New in DuctPro
1.0
July 20, 2026
Subscriptions & In-App Purchases
$9.99
DuctPro Pro
Every duct type, jobs, and PDF schedules — one purchase
FAQ
What is DuctPro?
DuctPro is a utility app designed to replace physical duct wheels for HVAC professionals. It allows for instant sizing of various duct types, tracks static pressure, and can export professional PDF schedules.
How does DuctPro calculate duct sizes?
DuctPro uses the Darcy–Weisbach and Colebrook–White equations for its calculations, providing transparent methodology. Users can input CFM and set friction rate or velocity limits for instant results.
What duct types does DuctPro support?
DuctPro supports round, rectangular (with side locking), flex ducts (including compression correction), and flat-oval ducts. The free version offers round-duct sizing, with other types unlocked via a one-time purchase.
Can DuctPro be used offline?
Yes, DuctPro works offline, making it a reliable tool for use on job sites without internet connectivity. No account is required to use the app.
What are the pricing details for DuctPro?
Round-duct sizing is free. A single purchase of $9.99 unlocks all duct types, reverse mode, job management, and PDF schedule exports. This is a one-time fee, not a subscription.
Does DuctPro have ads?
No, DuctPro does not contain advertisements. The app offers a free tier for basic functionality and an optional one-time purchase for advanced features.
What devices is DuctPro available on?
DuctPro is available for iPhone and iPad devices, indicated by its support for iOS platforms.
How often is DuctPro updated?
DuctPro was last updated on July 20, 2026, with version 1.0. Further updates will likely be released to improve functionality and add features.
