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Drywall Calculator — Sheets, Screws, Tape & Joint Compound

Editable live calculator

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No hidden assumptions. Inputs, units and the working stay visible so you can check the calculation.

Room length (ft) Room width (ft) Wall height (ft) Openings to exclude (sq ft) Use the actual combined door/window area.Include ceiling? Panel length (ft) Panel width (ft) Waste / layout allowance (%) Screws per sheet — editable Planning rate only; replace with your fastening schedule.Tape per sheet (ft) — editable Clear or set 0 if you do not want this estimate.Joint compound per sheet (lb) — editable Planning rate only.Price per sheet (optional)

Calculated result

15 sheets

Net board area: 432 sq ft (352 walls + 120 ceiling − 40 openings)

Area with 10% allowance: 475.2 sq ft

Panel coverage: 32 sq ft per 8 × 4 ft sheet

Screws: 480 at 32 per sheet

Tape: 180 ft at 12 ft per sheet

Joint compound: 26.25 lb at 1.75 lb per sheet

Show the working

1. Walls = 2 × (12 + 10) × 8 = 352 sq ft; ceiling = 12 × 10 = 120 sq ft.
2. Net area = 472 − 40 = 432 sq ft.
3. Sheets = ceil(432 × (1 + 10%) ÷ 32) = 15.

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