Gypsum board area estimator

Drywall Square Footage Calculator

Calculate drywall square footage from total wall length, wall height, ceiling area, openings, waste, and sheet size. Use it when gypsum board or sheetrock searches need net area before a sheet count.

Units

Total wall length (ft)Wall height (ft)Ceiling area (ft²)Door/window openings (ft²)Waste / cuts (%)Sheet area (ft²)Cost per sheet ($)

Sheets to buy

Drywall area

Order area

Rough cost

Drywall area is a takeoff estimate

This calculator estimates board area and sheets only. Board layout, seams, fire rating, moisture board, ceiling lifts, offcuts, access, and local inspection rules can change the final order.

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Drywall square footage formula

Gross wall area = total wall length × wall height

Net drywall area = gross wall area + ceiling area - openings

Order area = net area × (1 + waste %)

Sheets = order area ÷ sheet area

Sample takeoff

A room with 52 ft of wall length, 8 ft walls, 180 ft² of ceiling, 40 ft² of openings, 10% waste, and 32 ft² sheets needs about 20 sheets from 612 ft² of order area.A room with 15.6 m of wall length, 2.4 m walls, 16.7 m² of ceiling, 3.7 m² of openings, 10% waste, and 2.88 m² boards needs about 20 boards from 55.5 m² of order area.

Drywall Square Footage Calculator FAQ

How do I calculate drywall square footage?+

Multiply total wall length by wall height, add ceiling area if needed, subtract openings, then add waste before dividing by sheet area.Multiply total wall length by wall height, add ceiling area if needed, subtract openings, then add waste before dividing by sheet area.

Is gypsum board the same calculation as drywall?+

For a quantity takeoff, yes. Gypsum board and sheetrock are counted from net wall or ceiling area and the board size you plan to buy.For a quantity takeoff, yes. Gypsum board and sheetrock are counted from net wall or ceiling area and the board size you plan to buy.

Should I count openings?+

Subtract large doors and windows for a tighter estimate, but keep enough waste for offcuts, broken corners, and room layout.Subtract large doors and windows for a tighter estimate, but keep enough waste for offcuts, broken corners, and room layout.