Best Duct Calculator For Hvac Installations Apps

222+ iOS apps curated and reviewed

4.3 avg rating
13 free apps
Updated June 2026

Looking for free duct calculator for hvac installations apps? 13 of our 222+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Top Picks for Duct Calculator For Hvac Installations

Duct Calculator - DuctCalc#1

Duct Calculator - DuctCalc by Mikhail Nikitin

HVAC Sizing & Psychrometric
Editor's Choice
🔧 Utilities
5.0(7 ratings)
FreeIn-App Purchases
Duct Calculator - DuctCalc screenshot 1
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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.

Greenheck Toolbox#2

Greenheck Toolbox by Greenheck

Strong Contender
🔧 Utilities
3.0(3 ratings)
Free
Greenheck Toolbox screenshot 1
Greenheck Toolbox screenshot 2

This utility app provides two essential tools for HVAC professionals: a Fan Law Calculator to adjust fan performance based on changes in speed, and a Ductulator to quickly size ductwork. Easily calculate and determine duct dimensions and airflow with various input parameters.

Ductulator - Duct Sizing#3

Ductulator - Duct Sizing by Wassim Murr

HVAC Duct Design Calculator
Worth Considering
📊 Productivity
4.7(272 ratings)
$3.99
#36in Productivity
Ductulator - Duct Sizing screenshot 1
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Ductulator - Duct Sizing screenshot 3
Ductulator - Duct Sizing screenshot 4
Ductulator - Duct Sizing screenshot 5
Ductulator - Duct Sizing screenshot 6

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.

More Duct Calculator For Hvac Installations 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
Duct Calculator.
Duct Calculator.
Duct Calculator.
HVAC Airflow & Duct Sizing
Free
📊 Productivity
(0)
6
SuperCool Slide Rule HVAC
SuperCool Slide Rule HVAC
SuperCool Slide Rule HVAC
by Designstein, llc
Free

This app offers a comprehensive suite of tools for HVAC technicians. It provides interactive guides, step-by-step repair instructions, and calculators for various HVAC calculations including superheat, subcooling, and duct sizing.

Superheat & Subcooling chargingDuct sizing & layout calculatorCompressor windings troubleshooter
🔧 Utilities
(185)
free
7
Digiduct
Digiduct
Digiduct
Duct-Sizing App
Free

This HVAC tool assists professionals with duct sizing calculations based on ASHRAE standards. It supports multiple duct shapes and offers intelligent features to ensure accurate and reliable designs for real-world scenarios.

Duct sizing for rectangular, round, and flat oval ductsCustomizable dimensions with locked valuesDuct location intelligence for context-aware sizing
🔧 Utilities
(10)
ad-supported
8
Air Duct Size Calculator
Air Duct Size Calculator
Air Duct Size Calculator
Pressure Drop & Friction Rate
Free
🔧 Utilities
(0)
9
Thermaflex Duct Calculator
Thermaflex Duct Calculator
Thermaflex Duct Calculator
by Gastite Products LLC
Free

This utility app helps HVAC engineers quickly calculate the recommended Thermaflex duct size for installations. Input project volume and friction loss to determine the optimal duct size based on established industry standards.

Calculate recommended duct sizeInput project volume and friction lossSelect Thermaflex product
🔧 Utilities
(1)
free
10
CE HVAC Pro+
CE HVAC Pro+
CE HVAC Pro+
HVAC Tools
Free

This app provides HVAC technicians with instant access to product information, including warranty status, inventory, and technical specifications. It offers real-time support, order tracking, and helpful calculators to streamline job management and business growth.

Real-time product availability & pricingOrder status and notificationsVideo/Text technical support
📊 Productivity
(1.5K)
free with in-app purchases
11
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
12
HVACR Check & Charge
HVACR Check & Charge
HVACR Check & Charge
PT Charts Superheat Subcooling
Free

This app provides an instant mobile refrigerant charge calculator for HVACR applications. It supports various refrigerants and allows users to calculate the correct system charge based on superheat, subcooling, or airflow, along with environmental conditions.

Instant refrigerant charge calculatorSuperheat calculator (non-TXV)Subcooling calculator (TXV)
🔍 Reference
(17K)
free
13
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
14
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
15
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
16
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
17
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
18
Bluon HVAC
Bluon HVAC
Bluon HVAC
HVAC Tools
Free

Access a vast database of HVAC models, manuals, and part lists to speed up your work. Utilize an AI-powered troubleshooting tool or connect with experienced technicians for real-time support.

500,000+ HVAC unit databaseManuals and part listsAI troubleshooting tool (MasterMechanic)
🔧 Utilities
(4.4K)
ad-supported
19
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
20
Gemaire HVAC Pro+
Gemaire HVAC Pro+
Gemaire HVAC Pro+
HVAC Tools
Free

This app provides HVAC professionals with essential tools and product information to streamline their work. Access pricing, order status, real-time availability, and technical support. It also includes inventory management, warranty services, and helpful calculators.

View pricing and order statusReal-time product availabilitySearch for HVAC models and parts
📊 Productivity
(798)
free with in-app purchases