Drywall Calculator — Sheets, Screws, Mud & Tape
Get a full drywall materials list. Enter the total surface area (walls plus ceiling) and this calculator returns the sheets, screws, joint compound, and tape you need.
How to use this calculator
- Add up the wall and ceiling area you are covering, in square feet.
- Pick the sheet size — 4×12 sheets mean fewer seams to finish but are heavier to handle.
- Screws, compound, and tape are estimated for a standard three-coat finish.
- Use moisture-resistant board in bathrooms and 5/8 in board on ceilings and for fire ratings.
The formula
Sheets are figured by area; the finishing materials scale with it too.
Sheets = area × (1 + waste) ÷ sheet area (a 4×8 sheet is 32 sq ft).
Screws ≈ 32 per sheet. Joint compound ≈ one 4.5 gallon bucket per 475 sq ft. Tape ≈ 0.5 ft per sq ft of board.
Worked example
500 sq ft of walls and ceiling, 4×8 sheets, 10% waste.
Sheets = 500 × 1.10 ÷ 32 = 17.2 → 18 sheetsScrews = 18 × 32 = 576Compound = 500 ÷ 475 → 2 buckets; tape = 500 × 0.5 = 250 ft
A 500 sq ft job needs ~18 sheets, ~576 screws, 2 buckets of compound, and ~250 ft of tape.
Frequently asked questions
How many sheets of drywall do I need?
Divide your total wall-and-ceiling area by the sheet area (32 sq ft for a 4×8) and add 10% for waste. A 500 sq ft job needs about 18 sheets.
How much joint compound and tape do I need?
Roughly one 4.5 gallon bucket of all-purpose compound per 475 sq ft, and about 0.5 ft of tape per square foot of board, for a standard three-coat finish.
What size drywall sheets should I use?
Longer 4×12 sheets create fewer seams to tape but are heavy and awkward in tight spaces. 4×8 sheets are easier to handle solo. Use 5/8 in board on ceilings to resist sagging.