Best apps like Duct Calculator: HVAC Sizing

10+ similar apps compared and reviewed

4.1 avg rating
9 free apps
Updated September 2026

Whether you want more options like Duct Calculator or a completely different take on the same concept, our curated list of 10+ similar apps has you covered. Updated for 2026 with the latest ratings and comparisons.

Top Alternatives to Duct Calculator

Fb2-to-ePub#1

Fb2-to-ePub by Semyon Chertkov

Editor's Choice
🔧 Utilities
0.0(0 ratings)
Free
Fb2-to-ePub screenshot 1
Fb2-to-ePub screenshot 2
Fb2-to-ePub screenshot 3
Fb2-to-ePub screenshot 4

Convert fb2 e-book files to ePub format directly on your iPhone or iPad. Read books in any reader app without needing extra software. Supports large archives and includes library search.

Duct Calculator - DuctCalc#2

Duct Calculator - DuctCalc by Mikhail Nikitin

HVAC Sizing & Psychrometric
Strong Contender
🔧 Utilities
4.6(32 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 apps like Duct Calculator

4
HVAC & Sheet Metal Calculator
HVAC & Sheet Metal Calculator
HVAC & Sheet Metal Calculator
Construction Math & Trade Pro
Free
$29.99 | 100% OFF

This app provides advanced calculations for HVAC and sheet metal professionals. It simplifies complex dimensional math, geometry, and trigonometry with specialized functions for ducting, airflow, and construction layouts. Offers a free trial before committing to a subscription.

Sheet metal calculations (radius, offset, wrapper length)Trigonometric functions (sine, cosine, tangent, arc)HVAC specific calculations (fan law, CFM, velocity)
🔧 Utilities
(75)
free with in-app purchases
5
Duct Calculator S&P
Duct Calculator S&P
Duct Calculator S&P
by S&P SISTEMAS DE VENTILACION SL.
Free

This utility app performs essential calculations for ventilation systems. It offers tools for converting duct sizes, determining air parameters like speed and airflow, and calculating pressure drops. It also includes a unit converter for various measurements.

Diameter conversion (circular to rectangular)Ventilation parameter calculation (diameter, speed, airflow, pressure)Pressure drop calculation for straight sections and system elements
🔧 Utilities
(1)
free
6
Allday HVAC Calc
Allday HVAC Calc
Allday HVAC Calc
Pipe and Duct calculations
Free

This app offers three specialized modules for HVAC engineers: a psychrometric calculator for air properties, a pipe calculator for fluid dynamics and selection, and a duct calculator for air speed and pressure loss. It provides detailed calculations and reference formulas in both SI and IP units.

Psychrometric air property calculationsPipe velocity and pressure loss calculationDuct speed and pressure loss calculation
🔧 Utilities
(1)
free
7
INVmate II
INVmate II
INVmate II
by Inventor
Free

This app showcases a company's commitment to innovation and reliability in electric equipment. It highlights their dedication to high-quality products, consumer needs, and environmental consciousness, aiming to enhance living standards globally.

Company history and evolutionCore business principlesProduct categories
🔧 Utilities
(3)
free
8
DuctSizer Pro
DuctSizer Pro
DuctSizer Pro
by LEONARDO NOVOA
Free

This tool quickly calculates HVAC duct sizes based on airflow and friction loss. It supports various duct shapes and provides key airflow values for field use.

Calculate CFM from duct sizeFind duct sizes from CFMSupports square, round, and oval duct
🔧 Utilities
(2)
free
9
MEP Calc - HVAC / Fire Tools
MEP Calc - HVAC / Fire Tools
MEP Calc - HVAC / Fire Tools
Pipe, Duct & Sprinkler Design
Free
🔧 Utilities
(0)
10
HVAC Duct Sizer
HVAC Duct Sizer
HVAC Duct Sizer
HVAC duct sizing and more...
$5.99

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.

Duct sizing by airflowDuct sizing by dimensionsRange of duct sizes calculation
🔧 Utilities
(8)
free with in-app purchases