DW

Drywall Calculator

The sheets of drywall (plasterboard) for a room's walls and ceiling.

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Result…

Units
m
m
m
Ceiling too
m²
m
m

Common: 1.2 × 2.4 m; 4 × 8 or 4 × 12 ft.

%

For cuts and breakage; 10% is usual, 15% for diagonal layouts.

 

…

How it's calculated

Area = 2 × (length + width) × height (+ ceiling) − openings
Sheets = area × (1 + waste %) ÷ sheet area, rounded up

Counts the drywall (plasterboard) sheets to line a rectangular room. Openings are subtracted, but many fitters leave small openings in and cut them out, which is what the waste allowance is for. Longer sheets mean fewer joints to tape.

Your numbers, step by step

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