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.
4.6(11 ratings)
Free
Best apps like Duct Calculator - DuctCalc
10+ similar apps compared and reviewed
4.8 avg rating
8 free apps
Updated July 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.
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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.
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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)
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Duct Calculator Elite
HVAC Ductulator & Duct Sizing
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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.
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Allday HVAC Calc
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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
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AC Calculator - HVAC Sizing
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This utility app simplifies HVAC sizing by calculating BTU/h capacity and recommending equipment. It offers unit conversions, price estimates, and energy consumption comparisons. Advanced features can be unlocked via in-app purchases.
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This app provides HVAC inspection tools and guidelines for home inspectors. It helps estimate equipment age, size, and requirements, giving inspectors confidence in their reports.
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HVAC Refrigerant PT
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This utility app provides HVAC professionals with essential refrigerant pressure and temperature charts, along with detailed physical properties for numerous refrigerants. It offers customizable units for temperature and pressure, making it a comprehensive tool for air conditioning system diagnostics and maintenance.
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