Subfloor Calculator
Calculate subfloor materials, cost, and requirements for your flooring project. Estimate plywood, joists, screws, and labor costs.
Step 1: Room Dimensions
Measuring Tips
Measure the longest and widest points of your room. For irregular rooms, break into rectangles and add areas. Include closets and alcoves for accurate material estimates.
Step 2: Material Details
Material Selection
Plywood is standard for most subfloors. OSB is more economical. Concrete requires special preparation. Always add 10-15% waste factor for cutting and fitting.
Subfloor Calculation Results
Total Project Cost
Subfloor Material Comparison
| Material Type | Thickness | Cost per Sheet | Durability | Best For |
|---|
Cost Breakdown Analysis
Subfloor Calculation Formula
Total Sheets = (Area ÷ Sheet Coverage) × (1 + Waste Factor)
The number of subfloor sheets needed is calculated by dividing total area by sheet coverage (typically 32 sq ft for 4×8 sheets), then adding the waste factor for cutting and fitting.
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