Best Free Ductulator Apps

48+ iOS apps curated and reviewed

4.3 avg rating
16 free apps
Updated July 2026

With an average user rating of 4.3★, the free ductulator category is one of the App Store's strongest. Browse all 48+ apps we track, sorted so the most loved ones surface first.

Compare top Free Ductulator Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1PT DuctulatorPT DuctulatorFreeNoNoMay 2026
2SMACNA Duct-U-LatorSMACNA Duct-U-LatorFree5.0★ (1)NoNoMay 2026
3Duct Calculator - DuctCalcDuct Calculator - DuctCalcFree5.0★ (7)NoYesJul 2026
4SuperCool Slide Rule HVACSuperCool Slide Rule HVACFree4.2★ (185)NoNoJul 2026
5DigiductDigiductFree4.6★ (11)YesNoJul 2026
6WinFab - Sheet Metal DuctulatorWinFab - Sheet Metal Ductulator$3.994.8★ (6)NoNoJul 2026
7Quietflex DuctulatorQuietflex DuctulatorFree5.0★ (1)NoNoMay 2026
8DuctalatorDuctalatorFreeNoYesMay 2026

Top Picks for Free Ductulator

Duct Calculator - DuctCalc#3

Duct Calculator - DuctCalc by Mikhail Nikitin

HVAC Sizing & Psychrometric
Worth Considering
🔧 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.

More Free Ductulator apps to explore

4
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
5
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
(11)
ad-supported
6
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
7
Quietflex Ductulator
Quietflex Ductulator
Quietflex Ductulator
by Goodman Manufacturing L.P.
Free

This utility app helps HVAC professionals and enthusiasts quickly calculate essential airflow metrics for various duct sizes. It provides CFM, FPM, and FL values, simplifying HVAC system design and analysis.

Calculate CFMCalculate FPMCalculate FL
🔧 Utilities
(1)
free
8
Ductalator
Ductalator
Ductalator
HVAC Duct Sizing Calculator
Free
📊 Productivity
(0)
9
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
10
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
(812)
free with in-app purchases
11
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
12
Greenheck Toolbox
Greenheck Toolbox
Greenheck Toolbox
by Greenheck
Free

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.

Fan Law CalculatorDuctulator AppAdjust fan performance
🔧 Utilities
(3)
free
13
Homans HVAC Pro+
Homans HVAC Pro+
Homans HVAC Pro+
HVAC Tools
Free

This app provides HVAC professionals with tools and information to streamline their work. Access product details, calculators, order status, and warranty information on the go. Find nearby branches, check inventory, and manage parts lists efficiently.

Real-time order statusDuct calculatorProduct availability and pricing
📊 Productivity
(63)
ad-supported
14
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
15
Ductulator
Ductulator
Ductulator
by Simon Leroux
Free

This app provides a simple and efficient tool for calculating the dimensions of square ventilation ducts. It's designed for engineers, architects, and contractors to generate data for mechanical ventilation, cooling, and HVAC projects. Quickly validate residential and commercial solutions with this easy-to-use calculator.

Calculate equivalent round diameter of square ductsConvert square duct dimensions by volume ratioProvide metric equivalence
📊 Productivity
(2)
free
16
HVAC Duct Tools Manual D
HVAC Duct Tools Manual D
HVAC Duct Tools Manual D
Manual D duct sizing & checks
Free

This utility app provides HVAC professionals with tools for duct sizing and field checks based on ACCA Manual D methods. It offers quick calculations for duct size, friction rate, velocity, and static pressure, all while prioritizing user privacy and offline functionality.

Quick duct sizing (round/rectangular)Duct friction rate and velocity checksStatic pressure calculations
🔧 Utilities
(1)
free
17
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
18
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
(43)
ad-supported
19
Baker HVAC Pro+
Baker HVAC Pro+
Baker HVAC Pro+
HVAC Tools
Free

This app provides HVAC/R professionals with on-the-go access to product information and essential tools. It features real-time order tracking, a duct calculator, warranty verification, and branch location details. Users can also search for parts, view technical documents, and receive special offer notifications.

Real-time order statusDuct calculatorProduct availability and pricing
📊 Productivity
(587)
ad-supported
20
Peirce Phelps HVAC Pro+
Peirce Phelps HVAC Pro+
Peirce Phelps HVAC Pro+
HVAC Tools
Free

This app provides HVAC professionals with on-the-go access to product information, real-time availability, and pricing. It includes tools for finding AHRI matched systems, checking warranties, and locating parts, along with helpful calculators and a flashlight feature.

Real-time product availability and pricingAHRI matched system searchWarranty verification
📊 Productivity
(52)
ad-supported