What it calculates
Estimate sheets from wall and ceiling area.
Drywall Calculator
Estimate drywall sheets from total wall/ceiling area and waste.
Planning and estimating aid only. Verify project requirements, manufacturer instructions, adopted codes, permits, and field conditions before performing regulated work.
Construction estimating
How to Use This Calculator
Enter the measurements and job information you know, select Calculate, then use the result as a starting point for estimating, purchasing or project planning.
How the calculation works
Total surface area plus waste is divided by the selected sheet area.
What the result means
Sheet layout, ceiling height, openings and minimizing butt joints can change the best sheet count/size.
A room takeoff in sheets
For 320 square feet of wall area and 10% waste, the order area is 352 square feet. With 4 × 8 sheets (32 square feet each), the area-based result is 11 sheets. With 4 × 12 sheets (48 square feet each), it is 8 sheets after rounding up.
Contractor tip: Measure wall surfaces separately from ceilings. The input is surface area, not room floor area. A 120-square-foot floor does not mean the walls need 120 square feet of board.
Verify the final quantity
An area result is not a cutting layout. Sketch how full sheets land on framing; doors, windows, offcuts, ceiling access and joints can make a different sheet count more practical. Do not add a second waste allowance if one is already included.
Good practice: Compare the calculated quantity with plans, specifications, product packaging and current field conditions before purchasing material.