How many sheets of drywall for 1,000 square feet?

35 sheets of 4x8 with 10 percent waste: 1,000 x 1.10 = 1,100 sq ft, divided by 32 = 34.375, rounded up to 35. In 4x12 sheets it is 1,100 / 48 = 22.9, so 23.

How much waste should I allow for drywall?

About 10 percent for simple rooms and 15 percent when there are many openings or sloped ceilings.

Which thickness should I use?

1/2 in is standard on interior walls. 5/8 in Type X is the fire-rated sheet used in garages, separations and many commercial walls. Thickness doesn't change the sheet count.

Should I subtract doors and windows?

The calculator uses the area you enter. If your crew takes out large openings, subtract them before you type the number in; the waste allowance covers cutting around the rest.

Is this number a quote?

No. It is an estimate to help you plan and build your bid. Confirm the final quantity with your supplier before you order.

Free calculator

Drywall calculator (sheets)

Add up the wall and ceiling area in square feet, add your waste, divide by the sheet size (4x8 = 32 sq ft, 4x12 = 48 sq ft) and round up. 1,000 sq ft with 10 percent waste is 35 sheets of 4x8.

Your job

Area to hang

Wall and ceiling area

Sheet size

4x8 = 32 sq ft, 4x10 = 40 sq ft, 4x12 = 48 sq ft.

Waste

Waste factor10%

10 percent for simple rooms, 15 percent with many openings or sloped ceilings.

Every sheet you need, to scale. The last one is shaded when part of it is waste.

4x8 sheets

35sheets

1,100 sq ft with waste

In 4x10 sheets

28sheets

In 4x12 sheets

23sheets

Area to hang

1,000sq ft

With waste

1,100sq ft

The working, with your numbers

1. With waste1,000.0 x 1.10= 1,100.0 sq ft
2. Sheets1,100.0 / 32= 34.375
3. Rounded up4x8 sheets= 35

Typed those measurements in by hand?MetreMate measures them straight off your PDF plans. Free to start.

The formula, in plain words

1Area to hang = wall area plus ceiling area, in square feet.
2Area with waste = area times (1 plus your waste allowance).
3Sheets = area with waste divided by the sheet size: 4x8 = 32 sq ft, 4x10 = 40 sq ft, 4x12 = 48 sq ft.
4Round up to whole sheets.

Worked example

1,000 sq ft of walls and ceilings, 10 percent waste, hung in 4x8 sheets.

1.Area with waste: 1,000 x 1.10 = 1,100 sq ft.
2.Sheets: 1,100 / 32 = 34.375.
3.Round up: 35 sheets of 4x8.
4.Same job in 4x12: 1,100 / 48 = 22.9, round up to 23 sheets.

Answer: 35 sheets of 4x8 (or 23 sheets of 4x12).

Measured this off a plan? Do it in MetreMate

Upload the PDF, set the scale and measure on screen. MetreMate gives you the square feet, linear feet and counts off the plan; then you apply the thickness, pitch, waste or sheet size here. Runs in your browser, free to start, no credit card.

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How to measure it

Walls: measure the length of each wall in feet and multiply by the wall height. Or add up the room perimeter and multiply by the height.
Ceilings: length times width of each room.
Measured it off the plans? Use the total area option and type in the square feet.

Where the numbers come from

Every default in the calculator comes from a published source. We list the source next to it so you can check.

What	Value	Source
Sheet coverage: 4x8 = 32 sq ft, 4x10 = 40 sq ft, 4x12 = 48 sq ft	32 sq ft (4x8)	DrywallCalculator.net (checked 2026-09-20)
Drywall waste for simple rooms	10 percent	DrywallCalculators.com (checked 2026-09-20)
Drywall waste with many openings or sloped ceilings	15 percent	Home Project Calculators, drywall calculator (checked 2026-09-20)

Manufacturers named here are the source of the number, not a recommendation. Confirm quantities with your supplier.

Frequently asked questions

Stop typing measurements in by hand

MetreMate measures every wall, floor and roof straight off your PDF plan. Then it hands you the same numbers this calculator asks for.

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