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Drywall calculator

Estimate drywall sheets plus screws, tape, and compound for a room, with sheet sizes, a waste factor, and an optional cost total.

Enter the room to take off the boards.

Sheets are counted by area with the waste applied before rounding, per surface, which is how estimators order but not how installers plan: sheet orientation, stud height fit, and the seam layout are yours to check. Openings subtract in full, so a small window you would board over belongs in the waste allowance instead. Fire, moisture, and acoustic systems change sheet counts, screw counts, and compound coverage, and none of that is modeled here. Prices cover materials only.

Room, openings, sheets

UnitsFeet work in inches, gallons, and ft of tape; metres in cm, litres, and m

Length (ft)

Width (ft)

Height (ft)

Walls (all four)

Ceiling

Extra area (sq ft)Bulkhead, closet

Waste allowance (%)

More settings

Sheet size

PricesBlank rows are skipped, not guessed

Stud spacing (in)

Screws per box

Wall screws (in)

Ceiling screws (in)

Tape per roll (ft)

Compound per bucket (gal)

The rules are the trade defaults: one screw line per stud, 0.37 ft of tape per square foot of board, 0.009 gal of compound per square foot. Every value is editable.

At most 50 opening rows of 50% waste, room sides up to 100,000 ft. Walls and ceiling are counted separately because offcuts rarely transfer.

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Drywall calculator

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