How to measure: multiply each wall's width by its height, add them up, and subtract large windows and doors. Two-story homes typically have 1,800–2,800 sq ft of wall area.
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Frequently asked questions
How accurate is this siding calculator?
It gives a ballpark range from typical installed costs. Trim, soffit, repairs and access can change your quote — compare written estimates.
How do I calculate how much siding I need?
Measure each wall's width × height, add them, subtract windows and doors, and add about 10% for waste.
Sources: national figures ($4–$13/sq ft installed, vinyl $4.50–$8.20/sq ft, materials $1–$12 and labor $1–$4/sq ft, old-siding removal $0.70–$2.00/sq ft, stone up to $50/sq ft) come from the SidingCostEstimate 2026 cost guide. Other material ranges, project totals, climate recommendations and city/state adjustments are SidingCostEstimate editorial estimates based on typical scope, materials and labor — not survey data. Always compare written quotes from licensed local contractors.