Drywall Calculator
Estimate drywall sheets, mud, screws, and tape
Length of the room
Width of the room
Standard: 8 or 9 ft
Also drywall the ceiling?
Standard sizes
Total Area
—
sq ft
Drywall Sheets
—
sheets
Screws Needed
—
screws
Joint Compound
—
gallons
Tape Needed
—
feet
Estimated Cost
—
USD
Disclaimer: Results are estimates based on standard formulas. Not a substitute for professional advice from a licensed contractor, engineer, or architect. Verify all calculations before making purchasing or construction decisions.
How to Use This Calculator
Our drywall calculator estimates sheets, screws, joint compound, and tape for walls and ceilings.
- Measure room dimensions
- Decide on ceiling drywall
- Select sheet size
- Enter measurements
- Add 10% waste
AI Insights
Smart analysis for your project
Smart Estimates
Our AI cross-references material costs, regional pricing, and project complexity for more accurate estimates.
Waste Optimization
AI-calculated waste factors based on project type, not flat percentages. Saves 5-15% on material costs.
Best Practices
Recommendations derived from building codes, contractor data, and thousands of completed projects.
Calculation Formula
Wall area = 2 x (L + W) x H
Sheets = Total area / Sheet area + 10% waste
Screws ~ 32 per sheet
Mud ~ 0.05 gal/sq ft
Frequently Asked Questions
How many drywall sheets for 12x12 room?
About 16 sheets of 4x8 drywall (10 walls + 6 ceiling). Add 10% waste.
Should I use 1/2" or 5/8" drywall?
1/2" for walls with 16" stud spacing. 5/8" for ceilings (prevents sagging) and fire-rated walls.