Drywall fastener estimator

Drywall Screw Calculator

Estimate drywall screws and boxes from sheet count, sheet area, screw density, waste, and box count. Use it after the drywall sheet takeoff.

Units

Drywall sheets Sheet area (ft²)Override area (ft²)Screws per area Waste / extras (%)Screws per box Cost per box ($)

Screws to buy

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Screw boxes

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Drywall area

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Estimated cost

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Follow the fastening schedule

Fastener spacing changes with board thickness, ceilings, framing type, fire assemblies, adhesive use, and local inspection requirements. Verify the required schedule before hanging.

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Drywall screw formula

Drywall area = sheets × sheet area, or override area

Screws = area × screws per ft² × (1 + waste %)

Boxes = screws ÷ screws per box

Example

Twenty 4×8 sheets make 640 ft². At 1.25 screws per ft² with 10% waste, plan about 880 screws, or two 500-count boxes.Twenty 1.2×2.4 m boards make 57.6 m². At 13.5 screws per m² with 10% waste, plan about 856 screws, or two 500-count boxes.

Drywall Screw Calculator FAQ

How does this drywall screw calculator work?+

It multiplies measured job dimensions by the coverage, spacing, or package yield you enter, adds waste, then rounds the buy quantity up. Default screw density is a planning shortcut. Code or project specs may need a different spacing.It multiplies measured job dimensions by the coverage, spacing, or package yield you enter, adds waste, then rounds the buy quantity up. Default screw density is a planning shortcut. Code or project specs may need a different spacing.

Should I use the default waste value?+

Use the default for a quick planning estimate, then raise it for cuts, odd layouts, breakage, bad access, or product-specific loss.Use the default for a quick planning estimate, then raise it for cuts, odd layouts, breakage, bad access, or product-specific loss.

Is this a bid or code approval?+

No. It is a material planning calculator. Verify product data, local code, structural requirements, electrical requirements, and supplier packaging before ordering or building.No. It is a material planning calculator. Verify product data, local code, structural requirements, electrical requirements, and supplier packaging before ordering or building.