DuctPro: Duct Size Calculator

Duct Sizer & Static Pressure

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

The duct wheel, rebuilt for your pocket: size round, rect, flex, and flat-oval in seconds, tally static pressure per job, and hand over a clean PDF duct schedule. Replaces your duct wheel — and does what it never could. DuctPro sizes ductwork the way you actually work: type the CFM, set your friction rate or velocity limit, and get the size instantly. Round, rectangular, flex (with compression correction), and flat-oval. Then do what no wheel can: build the whole job, watch external static pressure add up run by run, and export a clean duct schedule PDF for the file or the customer. BUILT FOR THE FIELD • Instant sizing by friction rate or velocity — results update as you type • Round, rectangular (lock a side), flex with compression %, and flat-oval • Reverse mode: pick a size, see what it carries • Per-job static pressure tally with a fitting equivalent-length library • Client-ready PDF duct schedule with your company name • Velocity warnings when a run gets loud • Imperial and metric. Works offline. No account. HONEST ENGINEERING Darcy–Weisbach and Colebrook–White, computed — not looked up. The methodology page shows every formula and assumption. No ASHRAE tables are reproduced. SIMPLE PRICE Round-duct sizing is free forever. One $9.99 purchase unlocks every duct type, reverse mode, jobs, and PDF schedules. That's it — no subscription, versus $33 for the plastic wheel in your truck. Terms: https://web-chi-rosy-ve6dvxhliy.vercel.app/ductpro/terms · Privacy: https://web-chi-rosy-ve6dvxhliy.vercel.app/ductpro/privacy

Ratings & Reviews

  • 5.0
    out of 5
    1 Ratings

The developer, Marko Petro Hankevych, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    Marko Petro Hankevych
    Size
    1.4 MB
    Category
    Utilities
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    English
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    © 2026 Marko Hankewycz
  • Privacy Policy

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