Drywall Calculator

Your details

Use room dimensions to have the calculator work out wall and ceiling area for you, or enter a total area you have already added up.
The longer floor dimension of the room.
ft
The shorter floor dimension of the room.
ft
Floor to ceiling height. 8 ft (2.44 m) is the most common.
ft
Number of door openings to subtract (about 21 sq ft / 2 m2 each).
Number of window openings to subtract (about 15 sq ft / 1.4 m2 each).
Extra to cover cuts, breakage and off-cuts. 10% is typical; 15% for many openings, 20% for soffits, arches or angled ceilings.
%
Currency
Drywall sheets to buyRoom-sized job
19
Net area to cover533sq ft
Sheets before waste17
Total sheet coverage608sq ft
Joint compound39lb
Joint tape214ft
Screws (approx.)533

Buy 19 sheets of 4 x 8 drywall for this job.

  • That covers 608 sq ft, your 533 sq ft of board plus the waste allowance.
  • Plan on roughly 39 lb of joint compound, 214 ft of tape and 533 screws.
  • Larger sheets mean fewer seams to tape and mud, but they are heavier and harder to handle in tight spaces.

Next stepBuy all your board in one batch so thickness and edge profile match, and keep a spare sheet for patches later.

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