Duct Sheet Metal Weight Calculator
Estimate sheet metal duct weight.
Enter your values
ⓘ Live results
Results
- Surface area
- 86.7 sq ft
- Estimated weight
- 42.5 lb
- Weight per foot of run
- 2.12 lb/ft
Quick answer
Duct sheet metal weight is the surface area multiplied by the weight per square foot for the chosen gauge of galvanized steel.
Weight = surface area x lb per sq ft (by gauge)
How to use the Duct Sheet Metal Weight Calculator
- 1Enter the rectangular duct's width and height and total run length.
- 2Pick the sheet metal gauge specified for the job.
- 3The surface area is multiplied by the gauge's weight per square foot to estimate total weight.
Worked example
Using the values the calculator loads with:
Inputs
- Duct width16 in
- Duct height10 in
- Duct length20 ft
- Sheet gauge26 gauge (~0.49 lb/sq ft)
Results
- Surface area86.7 sq ft
- Estimated weight42.5 lb
- Weight per foot of run2.12 lb/ft
Frequently asked questions
Why does gauge matter for weight?
Thicker (lower number) gauge steel weighs more per square foot but resists dents and vibration better on larger ducts.
Does this include fittings?
No, this is straight duct only — add extra weight for elbows, transitions and reinforcement separately.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.