House Siding Calculator
Construction & DIYCalculate exterior wall siding squares (100 sq ft units), panel counts, and trim accessories for vinyl, fiber cement, or wood siding installations minus door and window cutouts.
Total 2,464 sq ft (2,200 net) · 1 square = 100 sq ft
About this calculator
Exterior wall siding is priced and ordered by the "square" (a unit equal to 100 square feet of wall coverage). Measuring exterior walls, gable triangles, and deducting windows and doors ensures accurate material procurement.
This calculator computes total gross wall area, adds gable triangular end zones, subtracts window and door openings, and outputs required siding squares with recommended waste factors.
How It Works & Formula
Net Wall Area = (Wall Length × Height) + (0.5 × Gable Width × Gable Height) - Openings Area. Siding Squares = (Net Area × (1 + Waste %)) / 100.
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