Best Hvac Duct Size Calculator Apps

227+ iOS apps curated and reviewed

4.2 avg rating
15 free apps
Updated May 2026

Duct Calculator is the household name in hvac duct size calculator, but it's far from the only option. We track 227+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Top Picks for Hvac Duct Size Calculator

More Hvac Duct Size Calculator apps to explore

4
Bluon HVAC
Bluon HVAC
Bluon HVAC
HVAC Tools
Free

Discover a powerful HVAC tool with access to a vast database of 500,000 HVAC models for manuals and part lists, troubleshooting support from MasterMechanic A.I., and live assistance from veteran technicians. Join the largest HVAC community to elevate your industry knowledge and skills today.

🔧 Utilities
(4.4K)
5
Ductulator - Duct Sizing
Ductulator - Duct Sizing
Ductulator - Duct Sizing
HVAC Duct Design Calculator
$3.99
📊 Productivity
(272)
6
Digiduct
Digiduct
Digiduct
Duct-Sizing App
Free

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.

🔧 Utilities
(10)
7
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)
8
Duct Calculator.
Duct Calculator.
Duct Calculator.
HVAC Airflow & Duct Sizing
Free
📊 Productivity
(0)
9
CE HVAC Pro+
CE HVAC Pro+
CE HVAC Pro+
HVAC Tools
Free

An HVAC tool application offering HVAC technicians easy access to warranty entitlement, inventory, order status, manuals, and tech specs for various models. It aims to support technicians with quality products, expert technical assistance, and business growth, positioning itself as a leading HVAC supplier. Experience real-time product availability and streamline your HVAC tasks with this free app.

📊 Productivity
(1.5K)
10
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)
11
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)
12
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)
13
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)
14
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)
15
Ductalator
Ductalator
Ductalator
HVAC Duct Sizing Calculator
Free
📊 Productivity
(0)
16
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)
17
HVAC School
HVAC School
HVAC School
By Techs For Techs
Free
📚 Education
(81)
18
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)
19
IN HVAC Calculator
IN HVAC Calculator
IN HVAC Calculator
HVAC Calculator & Reference
Free

This application provides HVAC inspectors with a reference point to estimate equipment age, size, and other relevant details, helping them to map out inspections and set the tone for their reports. It offers various calculators and guidelines for determining equipment circuit requirements, air conditioner tonnage, manufacture dates, and combustion air requirements.

🔧 Utilities
(11)
20
HVAC Duct Sizer
HVAC Duct Sizer
HVAC Duct Sizer
HVAC duct sizing and more...
$5.99

This application helps HVAC professionals quickly and easily size ducts using the constant friction method, with features to analyze existing duct systems and generate reports. Download the app to perform duct sizing analysis, track equipment, and access a range of HVAC calculation tools.

🔧 Utilities
(8)