Drywall Calculator

Estimate sheets for rooms, walls and ceilings.

Your inputs

Project name (optional)

Measure by

Room: perimeter × height for walls; length × width for the ceiling

Sheet size

4 × 8 ft sheet — coverage before cutting

Measurement unitsUS customaryMetric

Wall height (ft)

Include ceilings?

Enter each room once. Its perimeter determines wall area.

Room 1

Length (ft)

Width (ft)

Openings & exclusions

Doors / windows total area (ft²)

Material settings & waste

Sheet thickness

Records your selection; thickness does not change area yield. Verify your assembly requirements.

Waste allowance (%)

Editable planning allowance, not an optimized cutting plan.

Complete the required inputs to calculate. Check material settings for additional fields.

Enter dimensions and check the material settings to calculate.

Use this calculator as a guide. Independently verify all calculations for accuracy before starting your project.

“Measure twice. Cut once”
-- dad