OSB Sheathing Calculator
Count OSB sheets for wall and roof sheathing.
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OSB Sheets
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Count OSB sheets for wall and roof sheathing.
What the OSB Sheathing Calculator does
Count OSB sheets for wall and roof sheathing.
Enter your project dimensions or values on the left. Results update instantly with a material breakdown you can share via the copy-link button.
Worked example
Enter your project measurements using the defaults as a starting point, then adjust to match your room, wall, or yard.
Common mistakes to avoid
Ordering exact quantities without waste leads to mid-project shortages. Measuring only one wall when the project wraps corners also under-orders materials.
When to double-check with a pro
These calculators use standard formulas and typical waste factors. Structural loads, code requirements, and site conditions vary by region. Consult a licensed contractor or engineer for load-bearing work, electrical service upgrades, and septic design.
Last updated: August 7, 2026
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