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Siding is sold by the square. Know your count before the quote.
A siding quote is only as honest as the square count behind it. This calculator computes net wall area from your house dimensions minus door and window openings, adds the standard 10% cutting waste, and converts to squares — the unit every supplier and installer prices in. Walk into the quote conversation knowing your number.
Homeowners collecting siding quotes use this to know their square count before the first salesman measures — it converts a black-box estimate into a conversation. Contractors use it as a five-second first pass before a formal takeoff.
100 square feet of coverage — the universal pricing unit for siding, like roofing. A typical one-story 1,500 sq ft ranch has roughly 10–12 squares of wall area after openings and waste.
No — gable ends are triangular and measured separately: ½ × base × height each, then added to the wall total before the waste factor. Soffit, fascia, and trim are separate line items too.