SMACNA Duct-U-Lator by SHEET METAL CONTRACTORS NATIONAL ASSOCIATION, INC.
Size Simple HVAC Duct Runs





92+ iOS apps curated and reviewed
Every iPhone needs a few good ductulator duct sizing apps. We benchmark 92+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.




















This application is a duct sizing calculator designed to help users quickly and accurately determine the optimal size for sheet metal ducts. Try it out to streamline your duct sizing calculations and get precise results.


This HVAC duct-sizing app utilizes ASHRAE Fundamentals equations, offering accurate sizing for rectangular, round, and flat oval ducts with customizable dimensions and intelligent location parameters. Ensure precision in your HVAC designs by leveraging the unique features of this app.


Get advanced solutions for HVAC problems with an interactive app that guides technicians through repair steps. Simplify complex issues and enhance your repair processes.






This duct calculator app allows users to size ducts using the Equal Friction Method and Velocity Method, calculating dimensions and air velocity for round and rectangular ducts, with the option to subscribe for full airflow functionality. By subscribing, users can access the full range of airflow calculations and use the app offline, making it a convenient tool for duct sizing and engineering applications.


This convenient application allows HVAC engineers to easily determine the smallest recommended duct size for their installation, based on specific volume and friction loss. Simply select the product, friction loss, and volume, and the app will calculate the velocity and display the appropriate duct size for your application.


This mobile application allows users to easily calculate duct sizes and make necessary adjustments. Download it now to simplify your duct calculations and take control of your projects.




This ducting size calculator simplifies the job of duct sizing for HVAC professionals, allowing users to calculate duct size, velocity, pressure drop, and flow rate for ductwork with precision and ease. Download the app to streamline your duct sizing calculations and take advantage of customizable preference settings and accurate solver equations.


This application helps HVAC design professionals determine optimal duct sizes with precision, offering a list of suitable even-sized ducts at various aspect ratios. It features an intuitive interface for easy adjustments and calculations, making it a valuable tool for streamlining duct sizing tasks.




This application allows users to perform various duct calculations, including diameter conversions, ventilation parameter calculations, pressure drop calculations, and unit conversions, making it easy to design and optimize duct systems. Try it out to simplify your duct calculations and get accurate results quickly.


This application is a simple and efficient calculator for determining ventilation duct dimensions, specifically designed for engineers, architects, and contractors. It enables users to quickly calculate equivalent round diameters for square ventilation ducts, convert duct dimensions, and obtain metric equivalences, making it an essential tool for mechanical ventilation, air conditioning, and heating projects.


This application allows users to quickly size HVAC duct runs using the constant friction method, with features to analyze existing duct systems and display a range of duct sizes. It offers various input modes, unit conversions, and the ability to email results for further analysis on a desktop computer.


This mobile app provides HVAC professionals with on-the-go access to product information, tools, and resources to streamline their work, including order tracking, duct calculation, and product availability. By downloading the app, professionals can save time, increase efficiency, and stay connected with their supplier for expert technical support and exclusive offers.


This application offers two essential tools for HVAC professionals: a Fan Law Calculator to determine fan performance by modifying existing measurements, and a Ductulator to quickly size HVAC duct based on various inputs. By using these tools, users can easily calculate and determine essential parameters for their HVAC systems.