Calculate fan laws and size ducts
Fan Law Calculator allows users to input rpm, cfm, static pressure, and horsepower. Modifying one value recalculates the others. Ductulator helps size HVAC ducts by inputting shape, dimensions, air temperature, elevation, and roughness.
Showing 1–20 of 1,000 ranked alternatives.
Cyberprodigy LLC
Calculate size, velocity, and pressure drop
™ lets users input airflow, velocity, or friction to determine size. Calculate pressure drop and flow rate. Input dimensions for custom shapes. Export results and save calculations.
Wassim Murr
Size ducts by friction rate or velocity
Calculate sizes for rectangular and circular ducts by inputting maximum friction rate or velocity. Switch between calculation methods by tapping values. Convert between I-P and S-I units using a toggle switch. Export results for reference.
Pheinex, LLC
Calculate size and performance
Calculate size for round or rectangular ductwork. Adjust airflow, diameter, width, or height using sliders. Enter values directly for precise measurements. Lock friction calculations for accurate results.
Alan Cave
HVAC duct sizing for professionals.
The app calculates duct sizes for HVAC design professionals. It provides a list of even sized ducts that meet design criteria, allowing users to review options at various aspect ratios.
Steven Ramsay
Calculate air flow and duct sizes
Calculates air volume, pressure loss, velocity, and duct size for rectangular or round ducts. Supports both imperial and metric units. Users input values to determine required dimensions and system performance.
Carmel Software Corporation
HVAC duct sizing analysis application tool
The app sizes HVAC duct runs or a range of duct sizes using the constant friction method. Users can input airflow, dimensions, or a range of sizes to calculate results in English or Metric units.
Tan Chia Ling
Calculate airflow rate instantly
Calculate airflow displacement by inputting velocity or volume. Select duct type and dimensions with unit options. Instantly display results in preferred units including fl/min, m/s, and ft3/min.
Syska Hennessy Group, Inc.
Calculate ducts, verify designs, track results
Perform duct design calculations for rectangular, round, and flat oval shapes. Input dimensions and system parameters for accurate sizing. Verify calculations in real-time during field work. Sync with ASHRAE standards for reliable results.
Ratha Sou
Calculate in portrait, science in landscape
Perform basic calculations in portrait mode and scientific calculations in landscape. Use root, power, factorial, exponential, division, logarithm, and trigonometric functions. Features a flat UI design similar to built-in iOS apps.
Impala Studios B.V.
Calculate, edit, and track results
Calculator provides basic and scientific calculation functions. Users can access a history of past calculations for review or reuse. It includes a live currency converter for exchange rate checks.
Trond Rossvoll
HVAC calculations for building energy use.
The app performs HVAC calculations for building energy use. It helps users calculate SFP, temperature efficiency, air velocity, duct dimensions, and pressure drop.
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