Ductulator Calculator

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Results

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Round Duct Diameter: – inches

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Equivalent Square Dimensions: – inches

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Velocity: – FPM

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Friction Loss: – in. wg/100ft

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Airflow vs Velocity Chart

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\n\n\n\n\n\n\n\n\n## Ductulator Calculator – Free Online Tool for HVAC Sizing and Airflow Calculations\n\nDuct sizing is a critical part of any HVAC system design. The wrong duct size can lead to reduced airflow, increased energy consumption, and homeowner discomfort. A ductulator calculator helps HVAC professionals and DIYers quickly determine the correct duct size for a given airflow rate, friction loss, and velocity. This guide provides a comprehensive overview of the ductulator calculator, including how it works, real-world examples, and best practices for HVAC design.\n\n### What is a Ductulator Calculator?\n\nA ductulator calculator is an online tool that helps determine the appropriate dimensions for ductwork in heating, ventilation, and air conditioning systems. It uses standard HVAC formulas to calculate duct size based on airflow (CFM), friction loss (in. wg/100ft), and maximum air velocity (FPM).\n\nProfessionals use ductulator calculators to:\n\n- Size round and rectangular ducts\n- Ensure proper airflow to each room\n- Minimize energy consumption\n- Comply with HVAC design standards\n- Balance airflow across the entire system\n\nThe calculator is particularly useful for:\n\n- HVAC contractors sizing ductwork for new installations\n- Homeowners planning HVAC system upgrades\n- Students learning HVAC design principles\n- Remodelers modifying existing duct systems\n\n### How Duct