Calculate the number of plywood or OSB sheets needed for your project. Enter the total area to cover for subflooring, wall sheathing, roof decking, or any other application. Includes a waste factor for cuts and irregular shapes.
Enter Your Measurements
Results
Sheets Needed (with waste)
11
sheets
Sheets (exact)
10
sheets
Total Area
320
sq ft
Area per Sheet
32
sq ft
Total Coverage Purchased
352
sq ft
Formula
How to Use This Calculator
How to Use
- 1
Enter the length and width of the area to cover.
- 2
Enter the plywood sheet dimensions (standard is 4 × 8 feet).
- 3
Adjust the waste factor for cuts (10% for rectangular areas, 15-20% for complex shapes).
Frequently Asked Questions
Frequently Asked Questions
What thickness of plywood do I need?
What is the difference between plywood and OSB?
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About This Calculator
This calculator uses the formula: Sheets = (Area Length × Area Width) ÷ (Sheet Length × Sheet Width) × Waste Factor. All calculations follow industry-standard methods. Results are estimates — always verify with a licensed professional for structural or code-compliant work.
Built and maintained by the CalcSmart team. Last updated March 2026.
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