Area of Rectangular Duct Calculator
This calculator estimates the total surface area, shina length, and corner count required for manufacturing rectangular ventilation ducts. It considers duct dimensions, quantity, and optional seam allowances, making it essential for HVAC fabricators and planners.
Ventilation Duct Surface and Component Calculator
Area, Shina, and Corner Calculation Formula
Where:
- $$A$$, $$B$$ — side dimensions of the duct (in mm)
- $$L$$ — length of the duct (in mm)
- $$N$$ — number of duct units
- $$SC = 0.02$$ if seam is enabled, otherwise 0
- $$S = 0.12$$ if seam is enabled, otherwise 0
This calculator is designed to help engineers and HVAC installers determine the materials needed to fabricate rectangular ductwork. It converts all dimensions to meters, adds seam allowance where specified, and outputs the total surface area (pl), the length of the metal strip or shina (Shina), and the number of corner pieces (Ugol). This ensures accurate budgeting and cutting of materials for sheet metal ductwork.
how to convert Supply air ducts, rectangular 15,978 kg to square meter
how to get kg for elbow 90
it is goods
Why I can’t get the answer
Good
nice