Construction & Materials
Drywall Calculator
Drywall: drywall Calculator divides the wall and ceiling area by the area of one board, applies the waste % you enter, and rounds up to whole sheets. Worked through below with real figures, and the calculator repeats the working on your own inputs — free, on-device, instant.
Drywall Calculator turns your wall or ceiling area, sheet size and waste % into the number of sheets using wall and ceiling area, sheet size and waste %. The maths runs locally, so nothing you enter leaves the page.
Estimate only — not engineering or contractor advice. Quantities depend on the area, the product size and the waste % you enter, plus cuts, layout and openings, so confirm sizes with your supplier.
About this calculator
Drywall Calculator divides the wall and ceiling area by the area of one board, applies the waste % you enter, and rounds up to whole sheets. It matters before you buy: a clean volume estimate plus a waste allowance beats a guess every time. Worked below as A 3 m × 2.4 m wall is 7.2 m². Standard 1.2 m × 2.4 m sheets cover 2.88 m² each, so you need 7.2 ÷ 2.88 = 3 sheets . — and the calculator on this page repeats exactly that working for your inputs, instantly, and offline after load.
How to use
- Enter the wall or ceiling area in square feet.
- Pick the drywall sheet size.
- Set a waste percentage if you want a margin.
- Tap Calculate to see the number of sheets.
Why use the Drywall Calculator
Instant
Every quantity is worked out on your device the moment you tap Calculate.
Private
The numbers you enter stay in your browser and are never uploaded or saved.
Free
No signup, no paywall, and no ads placed inside your results.
Works offline
Once the page has loaded it keeps working on a weak or dropped connection.
Mobile-first
Laid out for phones and tablets on site just as much as for desktops.
Planning estimates
Results are simplified planning estimates; real material needs vary by product size, waste, layout, local codes, and site conditions, so confirm before you buy or build.
Common uses
Use it when planning a stud partition
Use it when budgeting a drywall job
Use it for a renovation or remodel
Use it for contractor and client quotes
Use it for estimating drywall sheets
Use it when ordering plasterboard
Technical notes
Drywall Calculator divides the wall and ceiling area by the area of one board, applies the waste % you enter, and rounds up to whole sheets.
Includes the waste % you enter; confirm coverage rates and material sizes with your supplier before ordering.
Nothing you type is uploaded — the calculation happens entirely on your device.
Worked example
A 3 m × 2.4 m wall is 7.2 m². Standard 1.2 m × 2.4 m sheets cover 2.88 m² each, so you need 7.2 ÷ 2.88 = 3 sheets.
FAQ
Which sheet sizes are supported?
You can choose 4 by 8, 4 by 10, or 4 by 12 foot sheets, each with its own coverage in square feet.
Does the Drywall Calculator upload my area?
No. The Drywall Calculator runs in your browser and your area is never sent or stored.
Should I subtract doors and windows?
For large openings, subtract their area before entering it; small openings are usually left in for waste.
Are sheets rounded up?
Yes. The count is rounded up to whole sheets so you order enough to cover the area.