SpecCalc

Drywall Calculators

Free drywall calculators for sheet counts, full rooms, and whole-house estimates. Enter your dimensions to get exact sheet counts and material cost estimates — instantly.

About these drywall calculators

All calculators use the industry-standard sheet coverage formula (32 sq ft per 4×8 sheet) with a 10% default waste factor. The whole-house calculator applies a 3.2× floor area multiplier — the industry standard for estimating total surface area in a typical home. Always perform a room-by-room takeoff before placing a large order.

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