Drywall Calculator for Ceilings
Estimate drywall sheets for a ceiling.
A ceiling's area is simply its length × width. Use 5/8 in sheets on ceilings to resist sagging; coverage is still 32 sq ft per 4×8 sheet. Enter the room size below.
Drywall Calculator
Estimate how much you need — and the cost.
- sq meters 10.22
Tip: Use 5/8 in drywall (or sag-resistant board) on ceilings so it does not droop between joists over time.
How it's calculated
A standard 4×8 ft sheet covers 32 sq ft; a 4×12 ft sheet covers 48 sq ft. Sheets = round up (wall + ceiling area × (1 + waste) ÷ sq ft per sheet).
See the full Drywall Calculator for the complete how-to, unit conversions, and data sources.
Drywall Calculator for Ceilings FAQ
How many sheets of drywall for a ceiling?
Divide the ceiling area by 32 sq ft per sheet and add about 10%. A 12 × 12 ft ceiling (144 sq ft) needs about 5 sheets.
What thickness of drywall for a ceiling?
Use 5/8 in for ceilings to prevent sagging, especially with joists spaced 24 in apart.