Best Duct Sizer Apps

167+ iOS apps curated and reviewed

4.2 avg rating
9 free apps
Updated June 2026

With an average user rating of 4.2★, the duct sizer category is one of the App Store's strongest. Browse all 167+ apps we track, sorted so the most loved ones surface first.

Top Picks for Duct Sizer

DuctSizer#1

DuctSizer by MULBERRYSOFT COMPANY LIMITED

Editor's Choice
🔧 Utilities
0.0(0 ratings)
$4.99
DuctSizer screenshot 1
DuctSizer screenshot 2
DuctSizer screenshot 3
DuctSizer screenshot 4

This utility app provides a quick and accurate ductulator for calculating equivalent round and rectangular duct sizes. It supports both Imperial and SI units, offering a simple finger-slide interface for fast computations.

Duct Calculator - DuctCalc#2

Duct Calculator - DuctCalc by Mikhail Nikitin

HVAC Sizing & Psychrometric
Strong Contender
🔧 Utilities
5.0(7 ratings)
FreeIn-App Purchases
Duct Calculator - DuctCalc screenshot 1
Duct Calculator - DuctCalc screenshot 2
Duct Calculator - DuctCalc screenshot 3
Duct Calculator - DuctCalc screenshot 4
Duct Calculator - DuctCalc screenshot 5
Duct Calculator - DuctCalc screenshot 6

This app provides professional HVAC duct sizing and psychrometric calculations in a single tool. It offers detailed calculations for various duct types and materials, along with comprehensive humid air property analysis. Designed for HVAC professionals, it replaces traditional ductulators with accurate digital functionality.

HVAC Duct Sizer#3

HVAC Duct Sizer by Carmel Software Corporation

HVAC duct sizing and more...
Worth Considering
🔧 Utilities
2.9(8 ratings)
$5.99In-App Purchases
HVAC Duct Sizer screenshot 1
HVAC Duct Sizer screenshot 2
HVAC Duct Sizer screenshot 3
HVAC Duct Sizer screenshot 4
HVAC Duct Sizer screenshot 5
HVAC Duct Sizer screenshot 6

This app provides quick and simple HVAC duct sizing analysis. It allows users to calculate duct dimensions based on airflow or existing dimensions, and can also determine a range of duct sizes. Results can be emailed for further analysis.

More Duct Sizer apps to explore

4
SMACNA Duct-U-Lator
SMACNA Duct-U-Lator
SMACNA Duct-U-Lator
Size Simple HVAC Duct Runs
Free

This tool simplifies HVAC duct sizing for professionals. It quickly calculates dimensions for rectangular, round, and oval ducts based on airflow, friction loss, and velocity, ensuring optimal ventilation system performance.

Rectangular, round, and oval duct sizingReal-time calculation updatesConverts duct shapes and sizes
💼 Business
(1)
free
5
DuctCalc.Ca
DuctCalc.Ca
DuctCalc.Ca
Ductulator Duct Calculator
Free

This utility app calculates duct dimensions and air velocity using two methods: Equal Friction and Velocity. It supports both round and rectangular ducts, offering precise calculations for HVAC professionals. Offline functionality is available with a subscription.

Duct sizing calculatorEqual Friction MethodVelocity Method
🔧 Utilities
(20)
free with in-app purchases
6
ASHRAE HVAC Duct Sizer
ASHRAE HVAC Duct Sizer
ASHRAE HVAC Duct Sizer
HVAC Duct Sizing and more....
$5.99

Calculate HVAC duct sizes using the constant friction method. Input airflow or dimensions to determine duct sizes, velocity, and friction loss. Supports rectangular, round, and oval ducts with adjustable air temperature and pressure.

Constant friction method duct sizingSize by airflow or dimensionsRange of duct sizes calculation
💼 Business
(0)
paid
7
WinFab - Sheet Metal Ductulator
WinFab - Sheet Metal Ductulator
WinFab - Sheet Metal Ductulator
by pasquale dipaola
$3.99

This app calculates the correct dimensions for sheet metal ductwork. It simplifies the process of determining airflow and pressure drop for HVAC systems. Essential for professionals in the sheet metal and HVAC industries.

Duct sizing calculationAirflow determinationPressure drop calculation
💼 Business
(6)
paid
8
Ductulator - Duct Sizing
Ductulator - Duct Sizing
Ductulator - Duct Sizing
HVAC Duct Design Calculator
$3.99

Instantly calculate HVAC duct sizes based on airflow, friction rate, or velocity. This tool provides accurate duct dimensions in seconds without needing charts, supporting various duct types and units.

Instant duct sizingFriction rate or velocity calculationMultiple valid duct dimensions
📊 Productivity
(272)
free
9
Spiralite Duct Sizer
Spiralite Duct Sizer
Spiralite Duct Sizer
by Khansaheb Industries Owned By Khansaheb Investment One Person CO LLC
Free
🔧 Utilities
(0)
10
釣りアプリ アングラーズ|釣果記録・魚つり情報・潮見表に
釣りアプリ アングラーズ|釣果記録・魚つり情報・潮見表に
釣りアプリ アングラーズ|釣果記録・魚つり情報・潮見表に
by ANGLERS Inc.
Free

Record your fishing catches with photos and automatically log details like location, weather, and tide charts. Discover popular fishing spots and gear through community-shared data. Connect with other anglers and book fishing trips directly through the app.

Automatic catch logging with photosIntegrated fishing maps and tide chartsCommunity-driven fishing spot discovery
⚽ Sports
(0)
free with in-app purchases
11
Duct Calculator
Duct Calculator
Duct Calculator
Ductulator & Duct Sizer
$19.99

This app allows HVAC professionals to quickly and accurately size new ducts or calculate the performance of existing ones. It supports both round and rectangular ductwork, offering precise calculations through direct entry or intuitive sliders. The tool provides live updates and outputs key performance metrics.

Size round and rectangular ductworkAdjust airflow, diameter, width, and heightDirect number entry for precision
🔧 Utilities
(179)
free
12
HVAC Duct Size Calculator
HVAC Duct Size Calculator
HVAC Duct Size Calculator
by Alan Cave
$0.99

This utility app assists HVAC design professionals in calculating duct sizes. It goes beyond basic calculations to provide a list of suitable duct sizes based on design criteria, offering an intuitive interface for precise adjustments.

Duct size calculationVelocity, friction, and volume calculationsList of even-sized ducts
🔧 Utilities
(1)
paid
13
DuctSizer Pro
DuctSizer Pro
DuctSizer Pro
by LEONARDO NOVOA
Free
🔧 Utilities
(2)
14
Heating & Cooling HVAC Pro+
Heating & Cooling HVAC Pro+
Heating & Cooling HVAC Pro+
HVAC Tools
Free

This app provides HVAC professionals with quick access to product information, tools, and support. It allows users to check pricing, availability, find locations, and manage warranty claims. Features include a PT calculator, duct calculators, and a flashlight tool for on-site work.

View pricing and order statusReal-time product availabilityFind branch locations and hours
📊 Productivity
(42)
ad-supported
15
Duct Sizer Calc HVAC
Duct Sizer Calc HVAC
Duct Sizer Calc HVAC
by Rizvan Adzhoian
$0.99
🔧 Utilities
(0)
16
Air Duct Size Calculator
Air Duct Size Calculator
Air Duct Size Calculator
Pressure Drop & Friction Rate
Free
🔧 Utilities
(0)
17
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)
18
AI Ductulator
AI Ductulator
AI Ductulator
by pasquale dipaola
$3.99

This application serves as a duct sizing calculator for HVAC professionals and enthusiasts. It provides quick and accurate calculations for duct dimensions based on various parameters.

Duct sizing calculationsHVAC parameter inputAccurate dimension results
🔧 Utilities
(9)
paid
19
DuctSizeCalc
DuctSizeCalc
DuctSizeCalc
by Technical Data Service Co.,Ltd.
$2.99

Easily calculate duct sizes for air conditioning systems using the constant-pressure method. Input wind volume and tap calculate to determine duct dimensions, pressure, and wind velocity. Useful for blueprints, working drawings, and on-site applications.

Constant-pressure method duct sizingInput wind volume for calculationSupports rectangular and circular ducts
📊 Productivity
(1)
paid
20
Duct Calculator Elite
Duct Calculator Elite
Duct Calculator Elite
Ducting Size Calculator
$6.99

This app simplifies HVAC duct sizing calculations. It computes duct size, velocity, pressure drop, and flow rate with an intuitive interface. Supports various units and duct materials for precise HVAC design.

Calculate duct size, velocity, pressure drop, flow rateDuct Size by Airflow modeDuct Size by Dimension mode
🔧 Utilities
(220)
paid