Drywall Calculator
Estimate drywall sheets for walls and optional ceiling.
Use decimals when needed. This estimate updates live and is safe to tweak before you buy materials.
Drywall Buying Guide
This guide helps you turn your drywall calculator result into a cleaner purchase plan. Use it when you want fewer return trips, better waste assumptions, and a more realistic cart.
Step 1: Measure twice
Take two independent measurements and use the larger value when they differ. That single decision prevents most material shortages.
Step 2: Set realistic waste
Simple layouts use lower waste, while angled cuts and pattern matching push waste higher. Do not force one waste value for every room.
Step 3: Buy by package unit
Suppliers sell by boxes, bundles, or rolls. Convert your estimate to purchase units and round up once at checkout.
Cost planning rule of thumb
Build your budget in three bands: material-only, material+consumables, and full project with tool contingency. This keeps expectations realistic before you buy.
Recommended for this job
Commonly paired tools and accessories
These are the practical extras people often forget until the last minute, especially when turning a rough estimate into a real purchase list.
Drywall liftWhy this helps: Common add-on that reduces last-minute store runs once the estimate is final.
Joint tape rollWhy this helps: Common add-on that reduces last-minute store runs once the estimate is final.
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Drywall Calculator FAQ
Do I need moisture-resistant board?
Use moisture-resistant board in bathrooms, laundry rooms, and damp spaces.
What size sheet is best?
4x8 is common for DIY handling. Longer sheets reduce seams in larger rooms.
What thickness of drywall should I use?
Use 1/2-inch for most walls, 5/8-inch for ceilings (to prevent sagging) and fire-rated walls, and 1/4-inch or 3/8-inch for curved surfaces.
How many screws per sheet?
A standard 4x8 sheet typically requires around 32 screws when fastening to studs spaced 16 inches on center.