How to estimate drywall
Measure the surface and choose a sheet size.
1
Calculate area
Multiply wall length by height and subtract large openings.
2
Choose a sheet
Match the size available locally.
3
Add waste
Use 10% for a simple room and more for cut-up spaces.
What does this tool do?
Drywall is sold in standard sheets. This calculator divides the surface area plus waste by the sheet area and estimates screws at a standard spacing.
The Formula
Sheets = Area × (1 + Waste %) ÷ Sheet areaFrequently Asked Questions
How many screws per drywall sheet?
A common guide is about 30 screws per 1.2 × 2.4 m sheet, spaced around 20–30 cm along framing.
Should I use 4 × 8 or 4 × 12 sheets?
Larger sheets mean fewer joints but are heavier and harder to handle. Choose based on access and labour.