Best Duct Calculator Apps

210+ iOS apps curated and reviewed

4.3 avg rating
15 free apps
Updated June 2026

Whether you're new to duct calculator or looking for an upgrade, our curated collection of 210+ iOS apps has something for everyone. Each app is reviewed and rated by real users, helping you make an informed decision.

Top Picks for Duct Calculator

Digiduct#2

Digiduct by Syska Hennessy Group, Inc.

Duct-Sizing App
Strong Contender
🔧 Utilities
5.0(10 ratings)
FreeAds
Digiduct screenshot 1
Digiduct screenshot 2
Digiduct screenshot 3
Digiduct screenshot 4

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.

More Duct Calculator apps to explore

4
Duct Calculator
Duct Calculator
Duct Calculator
by OMIKRON MAKINE MUHENDISLIGI IC VE DIS TICARET SANAYI LIMITED SIRKETI
Free

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.

🔧 Utilities
(1)
5
Duct Calculator.
Duct Calculator.
Duct Calculator.
HVAC Airflow & Duct Sizing
Free
📊 Productivity
(0)
6
Ductulator - Duct Sizing
Ductulator - Duct Sizing
Ductulator - Duct Sizing
HVAC Duct Design Calculator
$3.99
📊 Productivity
(272)
7
Duct Calculator
Duct Calculator
Duct Calculator
Ductulator & Duct Sizer
$19.99

This application allows HVAC engineers, designers, and contractors to quickly and accurately size new ducts or calculate the performance of existing ducts on their mobile devices. It enables users to perform calculations for round and rectangular ductwork, with features such as live updates, direct entry of numbers, and unit conversions, making it ideal for designing air handling systems.

🔧 Utilities
(179)
8
SuperCool Slide Rule HVAC
SuperCool Slide Rule HVAC
SuperCool Slide Rule HVAC
by Designstein, llc
Free

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

🔧 Utilities
(185)
9
Duct Calculator Elite
Duct Calculator Elite
Duct Calculator Elite
Ducting Size Calculator
$6.99

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.

🔧 Utilities
(220)
10
WinFab - Sheet Metal Ductulator
WinFab - Sheet Metal Ductulator
WinFab - Sheet Metal Ductulator
by pasquale dipaola
$3.99

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.

💼 Business
(6)
11
Thermaflex Duct Calculator
Thermaflex Duct Calculator
Thermaflex Duct Calculator
by Gastite Products LLC
Free

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.

🔧 Utilities
(1)
12
HVAC & Sheet Metal Calculator
HVAC & Sheet Metal Calculator
HVAC & Sheet Metal Calculator
Construction Math & Trade Pro
Free
$29.99 | 100% OFF

This ultimate calculator for HVAC professionals and sheet metal specialists simplifies complex calculations with precision tools for ducting offsets, angle measurements, and dimensional math. Try it out with a free trial and transform your workflow to increase accuracy, eliminate errors, and boost productivity with every calculation.

🔧 Utilities
(40)
13
HVACR Check & Charge
HVACR Check & Charge
HVACR Check & Charge
PT Charts Superheat Subcooling
Free

HVACR Check is a powerful tool for HVAC technicians that streamlines equipment checklists, service reports, and maintenance workflows. Simplify your work processes and stay organized with this all-in-one solution.

🔍 Reference
(16K)
14
Ductalator
Ductalator
Ductalator
HVAC Duct Sizing Calculator
Free
📊 Productivity
(0)
15
Duct Calculator S&P
Duct Calculator S&P
Duct Calculator S&P
by S&P SISTEMAS DE VENTILACION SL.
Free

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.

🔧 Utilities
(1)
16
DuctCalc.Ca
DuctCalc.Ca
DuctCalc.Ca
Ductulator Duct Calculator
Free

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.

🔧 Utilities
(20)
17
HVAC Duct Size Calculator
HVAC Duct Size Calculator
HVAC Duct Size Calculator
by Alan Cave
$0.99

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.

🔧 Utilities
(1)
18
Flat Pattern Bend Calculator
Flat Pattern Bend Calculator
Flat Pattern Bend Calculator
Cad for pipe elbow,cone,flange
Free

This application simplifies complex metal sheet calculations, enabling users to accurately calculate flat pattern bends for various shapes and structures. It offers a comprehensive tool for engineers, fabricators, and designers to generate precise flat pattern layouts, saving time and minimizing errors in fabrication projects.

🔧 Utilities
(147)
19
FieldFab
FieldFab
FieldFab
CAD for the HVAC installer
Free

This software helps HVAC installers design and visualize ductwork transitions in the field using Augmented Reality, saving time and effort by allowing them to test and refine their designs before cutting sheet metal. With features like sharing and exporting to PDF, installers and sales teams can collaborate and communicate more efficiently, making it easier to get the job done.

🎨 Graphics & Design
(65)
20
Construction Master Pro Calc
Construction Master Pro Calc
Construction Master Pro Calc
Feet Inch Fraction Calculator
Free

An essential tool for professionals working with dimensions, this app optimizes speed and accuracy while reducing errors. Try it for free before purchase on your App Store account. Ideal for enhancing productivity on the go.

🔧 Utilities
(38K)

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