Best Hvac Duct Sizer Apps

248+ iOS apps curated and reviewed

4.1 avg rating
12 free apps
Updated August 2026

Finding the right hvac duct sizer apps can be overwhelming with so many options. We've analyzed 248+ apps to bring you the best choices for 2026, from free options to premium solutions with advanced features.

Compare top Hvac Duct Sizer Apps (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Duct Calculator - DuctCalcDuct Calculator - DuctCalcFree5.0★ (7)NoYesAug 2026
2SuperCool Slide Rule HVACSuperCool Slide Rule HVACFree4.2★ (185)NoNoAug 2026
3HVAC Duct SizerHVAC Duct Sizer$5.992.9★ (8)NoYesJun 2026
4Duct Mate: HVAC Duct SizerDuct Mate: HVAC Duct SizerFreeNoYesJul 2026
5Duct Sizer Calc HVACDuct Sizer Calc HVAC$0.99YesYesJun 2026
6SMACNA Duct-U-LatorSMACNA Duct-U-LatorFree5.0★ (1)NoNoMay 2026
7Bluon HVACBluon HVACFree4.8★ (4.5K)YesNoAug 2026
8Duct Calculator EliteDuct Calculator Elite$9.994.8★ (229)NoNoAug 2026

Top Picks for Hvac Duct Sizer

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
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.

SuperCool Slide Rule HVAC#2

SuperCool Slide Rule HVAC by Designstein, llc

Strong Contender
🔧 Utilities
4.2😐(185 ratings)
Free
SuperCool Slide Rule HVAC screenshot 1
SuperCool Slide Rule HVAC screenshot 2
SuperCool Slide Rule HVAC screenshot 3
SuperCool Slide Rule HVAC screenshot 4
SuperCool Slide Rule HVAC screenshot 5

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.

What We Love

  • 👍 Great HVAC tool
  • 👍 Informative slide rule
  • 👍 Helpful for new techs
  • 👍 Quick and simple

Room to Improve

  • 🐛 Trial period issues
  • 🐛 App expires frequently
  • 🐛 Requires re-download
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 Hvac Duct Sizer apps to explore

4
Duct Mate: HVAC Duct Sizer
Duct Mate: HVAC Duct Sizer
Duct Mate: HVAC Duct Sizer
Duct Sizing & Airflow Calc
Free
🔧 Utilities
(0)
5
Duct Sizer Calc HVAC
Duct Sizer Calc HVAC
Duct Sizer Calc HVAC
by Rizvan Adzhoian
$0.99
🔧 Utilities
(0)
6
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
7
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
(4.5K)
ad-supported
8
Duct Calculator Elite
Duct Calculator Elite
Duct Calculator Elite
HVAC Ductulator & Duct Sizing
$9.99

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
(229)
paid
9
HVAC Ductulator
HVAC Ductulator
HVAC Ductulator
Duct Sizing Calculator
Free
🔧 Utilities
(0)
10
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
11
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
(317)
free
12
Duct Calculator: HVAC Sizing
Duct Calculator: HVAC Sizing
Duct Calculator: HVAC Sizing
HVAC duct sizing & airflow
Free
🔧 Utilities
(0)
13
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
14
DuctPro
DuctPro
DuctPro
HVAC Duct Sizing Calculator
Free
🔧 Utilities
(0)
15
HVAC Pipe Sizer Plus
HVAC Pipe Sizer Plus
HVAC Pipe Sizer Plus
All types of pipe sizing
$13.99

This utility app combines three specialized pipe sizing tools for HVAC systems: liquid, steam, and gas. It offers flexible input options, unit conversions, and an equipment locator for comprehensive HVAC design.

Liquid pipe sizingSteam pipe sizing with steam table calculatorGas pipe sizing (low and high pressure)
🔧 Utilities
(1)
paid
16
PT Ductulator
PT Ductulator
PT Ductulator
Duct Calculator
Free
📊 Productivity
(0)
17
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
18
AirFlow ProCalc
AirFlow ProCalc
AirFlow ProCalc
HVAC Duct Layout
$9.99
📊 Productivity
(0)
19
Air Duct Size Calculator
Air Duct Size Calculator
Air Duct Size Calculator
Pressure Drop & Friction Rate
Free
🔧 Utilities
(0)
20
DuctSizer: Duct Calculator
DuctSizer: Duct Calculator
DuctSizer: Duct Calculator
HVAC sizing: friction & CFM
Free
🔧 Utilities
(0)

FAQ about Hvac Duct Sizer

What are the best hvac duct sizer apps for iPhone?
Duct Calculator - DuctCalc tops our hvac duct sizer apps ranking as of August 2026, with a 5.0-star average from 7 App Store ratings, and it's free to download.
Yes — 12 of the top hvac duct sizer apps we rank are free to download, including Duct Calculator - DuctCalc and SuperCool Slide Rule HVAC.
Duct Calculator - DuctCalc has no ads and offers in-app purchases, according to its App Store listing as of August 2026.
We track 248+ hvac duct sizer apps on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.
Duct Calculator is a professional tool for HVAC engineers and contractors to perform accurate duct sizing and psychrometric calculations. It helps determine optimal duct sizes, calculate pressure drops for fittings, and analyze humid air properties.
Duct Calculator can size round, rectangular, and flexible ductwork. It supports calculations for 6 different duct materials, including galvanized steel, flex duct, and duct board.

Related searches