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
Expert Insights
Smart analysis for your Drywall project
Sheet Size Optimization
4x8 vs 4x12 sheets: longer sheets mean fewer joints but harder handling. AI recommends optimal size based on your room dimensions.
Mud & Tape Calculator
AI estimates joint compound based on total square footage and number of joints — not flat ratios that waste material.
Fire Rating Requirements
Type X 5/8" drywall required for garage-to-living-space walls. AI flags fire-rated requirements based on your room type.
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.