YardCompass

Home / Walls & Drywall

Walls & Drywall

Drywall Calculator — How Many Sheets Do I Need?

Enter the total length of the surfaces you’re covering and the height to estimate 4×8 drywall sheets, with 10% added for cuts and waste.

Units
Drywall needed

How this calculator works

We figure surface area (total length × height) and divide by 32 sq ft — a standard 4×8 sheet — then add 10% for cuts and waste. For ceilings, add their area to the total length × height as well.

What changes how much you need

  • A 4×8 sheet is 32 sq ft; a 4×12 sheet is 48 sq ft and means fewer seams on long walls.
  • Don’t subtract small openings; do subtract large ones (garage doors, picture windows).
  • Plan about 1 box of screws and ~0.5 lb of joint compound per sheet.
  • Buy a couple of extra sheets — corners and bad cuts happen.

Frequently asked questions

How many sheets of drywall do I need?

Divide the total wall and ceiling area by 32 (for 4×8 sheets), then add about 10% for waste.

Should I use 4×8 or 4×12 sheets?

4×12 sheets cover long walls with fewer seams (less taping) but are heavier and harder to handle. 4×8 is easier for DIY.

How much joint compound and tape?

Roughly half a pound of compound and a couple of feet of tape per square foot of joints — about a 5-gallon bucket and a roll of tape per 10–12 sheets.