Drywall Calculator
Enter your wall and ceiling area to get sheet count plus a rough materials list for mud, tape, and screws.
This calculator gives an estimate for planning purposes only. Verify quantities and code requirements with a qualified professional before ordering materials or performing work.
How it's calculated
Sheets needed
sheets = ceil((area sq ft × (1 + waste %)) / sheet sq ft)
Divide total wall + ceiling area by a single sheet's area (32 sq ft for 4x8, 40 for 4x10, 48 for 4x12), after adding a waste factor for cuts and breakage.
Mud, tape, and screws
~1 gal mud / 500 sq ft · ~1 roll tape / 1,000 sq ft · ~1 lb screws / 27 sheets
These are rough field rules of thumb for a first-pass materials list, not manufacturer spread-rate specs — actual coverage varies by compound type, texture, and number of coats.
Sheets needed by room size (8ft ceilings, 4x8 sheets, 10% waste)
| Room size | Wall + ceiling area | Sheets needed |
|---|---|---|
| 10' x 10' | 420 sq ft | 15 sheets |
| 12' x 12' | 528 sq ft | 19 sheets |
| 14' x 16' | 704 sq ft | 25 sheets |
| 20' x 20' | 1,040 sq ft | 36 sheets |
Skip the manual math on your next takeoff
Struvia reads your plans and pulls quantities like this automatically — upload a plan and see it measure a real takeoff.
Drywall Calculator FAQ
Which sheet size should I use?
4x8 (32 sq ft) is the standard for most residential walls and is easiest to handle solo. 4x12 (48 sq ft) covers more area per sheet with fewer seams, common on larger commercial walls or ceilings, but needs more hands to hang.
How much waste factor for drywall?
10% covers typical cuts and breakage for a straightforward room. Increase it for rooms with lots of angles, high ceilings, or if you're not experienced hanging sheets.
Do I need to calculate ceiling area separately?
No — enter your combined wall and ceiling square footage together. The sheet count comes out the same whether it's tracked as one total or split by surface.