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.
Calculator rates are SidingCostEstimate editorial estimates. For sourced prices see cost to side a house and the material guides for James Hardie, LP SmartSide, wood and stucco.
How to get and compare siding estimates →
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.
About these figures: per-square-foot ranges, project totals, climate recommendations and city/state adjustments in the tables on this page are SidingCostEstimate editorial estimates, scaled from typical national ranges with an estimated local cost factor. They are not survey data or quotes. For dated third-party benchmarks from Angi, HomeGuide, This Old House and the Cost vs. Value Report, see our methodology and cost to side a house. Always compare written quotes from licensed local contractors.