Free calculator

Duct Sheet Metal Estimator

Estimate the sheet metal area and steel weight for a rectangular duct run — useful for getting duct fabrication quotes.

Results

Enter your dimensions and hit Calculate.

Duct sizing for airflow must be done by an HVAC designer. This is a sheet-metal quantity estimator only.

Assumptions

  • 15% added for seams, overlaps, and fittings.
  • Galvanized steel weight ≈ 1.15 lb/ft² at 24-gauge. Adjust for thicker gauges.

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Land Planning Master Checklist

The complete checklist for planning your property — from raw land to build-ready site. Clearing, access, drainage, septic, utilities, permits, foundation, and everything in between.

  • ✓Every stage in the right sequence
  • ✓What to verify before each phase starts
  • ✓Questions to ask your contractor
  • ✓Common mistakes and how to avoid them

Free account — includes the checklist + 3 saved calculations.

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