Add surfaces
Keep each distinct wall and ceiling as a reviewable width × height row.
Drywall sheets without hidden assumptions
Turn measured surfaces into a sheet estimate you can check.
Add each wall and ceiling, choose 1200 × 2400 mm, 4 × 8 ft or custom sheet dimensions, then apply only your whole waste percentage. DrywallCalc shows gross area, purchase area, whole sheets and optional exact cost. It keeps openings inside gross area and does not pretend to optimize layout.
Free · No signup · No saved project · Runs in your browser
Three explicit steps
Measure, choose the sheet, state waste
Choose exact sheet dimensions
Use one exact preset or copy custom width and length from the selected product.
Enter your whole waste percent
Gross area stays separate; only the final sheet count rounds upward.
One bounded purchase job
Use the same transparent sequence
- Estimate repeated room walls and an optional flat ceiling.
- Compare exact 1200 × 2400 mm, 4 × 8 ft or custom face area.
- Multiply whole sheets by an optional exact price you enter.
Bring measurements and sheet size
Build an estimate you can explain
See gross area, explicit waste, exact sheet area and whole-sheet rounding without accounts or saved project data.