Things you may need
A quick list for the aisle. You may already own half of it.
- Drywall sheets
- Drywall screws
- Joint compound
- Tape
- Utility knife
- T-square
- Mud pan
- Sanding sponge
Drywall Calculator
Estimate drywall sheets, screws, joint compound, and material cost for simple wall projects.
Before you buy Measure once more, check the product label, then use this as your shopping-list number.
Enter your project details
Use the defaults for a quick estimate, or adjust the advanced fields to match the product you plan to buy.
How the estimate works
The calculator uses your measurements plus ordinary unit conversions. Editable fields handle the parts that change by product: waste, coverage, bag yield, box coverage, or material density.
The buy recommendation rounds up because stores do not sell half gallons, partial boxes, or a fraction of a bag.
Beginner notes
- Use the sheet size you actually plan to buy.
- Subtract large openings, but do not get too cute with tiny gaps.
- Ceilings, fire-rated walls, bathrooms, and garages may need different drywall.
Planning estimate only
Actual material needs change with product, installation method, surface condition, layout, waste, and local requirements. For structural, permit, drainage, electrical, plumbing, or load-bearing work, get qualified local guidance.
Questions people usually ask
How many screws per drywall sheet?
A rough planning number is about 32 screws per 4x8 sheet. Real fastening patterns depend on framing and local requirements.
Should I subtract doors and windows?
Subtract large openings if you know the square footage. Keep a waste buffer because cutouts still create scrap.
Does this estimate ceilings?
It can estimate flat square footage, but ceiling work may need extra help, thicker board, or different fastening.
Helpful next reads
Accuracy
How accurate are these calculators?
Where estimates work, where they fail, and when to check the product label instead.
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