Drywall Calculator
Free online Drywall Calculator.
Calculator
How to Use
- Enter the required values
- Click Calculate to see the result
- Review the detailed output
Formula
Sheets = Total Wall Area / Sheet Area + 10% waste. 4x8 sheet = 32 sq ft, 4x12 = 48 sq ft. Screws: ~1.2/sq ft. Joint compound: ~1 gal per 100-150 sq ft.
Example Calculations
Standard Room
Input: 12x14ft room, 8ft ceilings, 4x8 sheets
Result: 13 sheets (including 10% waste)
Whole Floor
Input: 4 rooms, total 800 sq ft wall+ceiling
Result: 28 sheets of 4x8, ~6 sheets of 4x12
Basement
Input: 20x30ft, 8ft ceilings, 2 windows, 1 door
Result: 30 sheets of 4x8 drywall
About This Calculator
Free online drywall calculator. Calculate instantly in your browser with our easy-to-use tool. No sign-up required.
Our drywall calculator is free, easy to use, and provides instant results. All calculations are performed in your browser for privacy and speed.
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Frequently Asked Questions
How many drywall sheets?
Total wall+ceiling area / sheet area (32 or 48 sq ft). Add 10% for waste.
What thickness?
Walls: 1/2 inch. Ceilings: 3/8 inch. Soundproof/fire: 5/8 inch. Damp areas: green board.
Joint compound needed?
~1 gallon covers 100-150 sq ft for taping. Plan 2-3 gallons per room.
Horizontal or vertical?
Walls <=9ft: horizontal (fewer seams, adds strength). Taller: vertical works well.
Estimate finishing materials?
Tape: total seam linear feet + 10%. Screws: ~1.2/sq ft. Mud: 2-3 coats.