Duct Surface Area & Weight Calculator

Duct Surface Area & Weight Calculations

Section

Longest Side Length (mm)

Shortest Side Length (mm)

Perimeter (mm)

Perimeter (m)

Section Length (m)

0.6 (26g)

0.8 (24g)

0.9 (22g)

1 (20g)

1.5 (18g)

This tool calculates the surface area and weight of a rectangular duct section based on its dimensions and material thickness. Follow these steps:

Enter the **Longest** and **Shortest Side Lengths** of the duct in millimeters.
Enter the **Section Length** in meters.
The surface area is automatically calculated for each thickness based on the longest side length.
The results are displayed for each section and summarized in the final table.
Click the **"Print All Sections"** button to get a clean printout of all your current calculations.

**Section Perimeter (mm):** $2 \times (Longest\ Side\ Length + Shortest\ Side\ Length)$
**Section Perimeter (Meter):** $Section\ Perimeter\ (mm) / 1000$
**Duct Surface Area ($m^2$)**: This is conditionally calculated based on the longest side length.
- $0.6mm$: if Longest Side $\le 300mm$
- $0.8mm$: if $300mm <$ Longest Side $\le 750mm$
- $0.9mm$: if $750mm <$ Longest Side $\le 1350mm$
- $1.0mm$: if $1350mm <$ Longest Side $\le 2100mm$
- $1.5mm$: if Longest Side $> 2100mm$
**Weight (Kg):** The weight is calculated based on the conditional surface area and the `Weight Factor`.
**Final Totals:** The total surface area and total weight include a 1.01 multiplier for safety and insulation.

All calculations are estimates. For professional applications, consult a qualified engineer and refer to local codes and standards.