Ductwork Calculator
Calculate the required duct size for HVAC systems based on airflow and friction loss. Helps in designing efficient ductwork.
Was this calculator helpful?
How to use this tool?
- 1 Enter the requested data in the fields above carefully.
- 2 Click the calculate button to process the information instantly.
- 3 Analyze the detailed result and the formula explanation presented below.
- 4 You can print, share, or even embed the calculator on your own site for free.
Unlike traditional static calculators, our tools adapt to specific user needs. They include detailed explanations of the formulas used, ensuring transparency in results. Furthermore, our design is focused on user experience, eliminating distractions and focusing on what really matters: your data and conclusions.
Previous Results
| Result | Inputs | Date |
|---|
Frequently Asked Questions
It helps determine the appropriate duct diameter or rectangular dimensions for HVAC systems based on airflow (CFM) and friction loss.
You need airflow in CFM, friction loss in inches of water gauge per 100 feet, and duct shape (round or rectangular with aspect ratio).
It uses the Darcy-Weisbach equation adapted for HVAC duct sizing: D = ((0.109136 * Q^1.9) / (f^0.5))^(1/5.02).
Advertisement
Advertisement