Construction calculator
Drywall Calculator
Estimate drywall sheet quantity for four walls and an optional ceiling, with deductions for doors and windows.
Wallboard estimate
Drywall Calculator
Drywall sheets
15
Uses 4 x 8 ft sheets.
Wall area
352 sq ft
Room perimeter x height
Ceiling area
120 sq ft
Included
Order area
475.2 sq ft
After openings and extra
Common Tools Used for Project Measurements
Project calculators usually need room dimensions, surface area, package coverage, or product label values.
Tape measure
Laser distance measurer
Level
Product coverage label
Notebook or floor plan
Keep measurements in one unit while entering values, then use the result as a planning estimate.
Formula
sheets = (wall area + ceiling - openings) x allowance / sheet area
Sheet orientation, fire ratings, moisture resistance, multiple layers, closets, soffits, and local code requirements can change the order.
Common Examples
| Input | Estimate |
|---|---|
| 12 ft x 10 ft room, 8 ft walls | 352 sq ft of wall area |
| 4 x 8 sheet | 32 sq ft per sheet |
| 10% extra | Allows for cuts and damage |