Estimate plywood sheets, area coverage, and cost.
Plywood Type Reference
Choosing the right plywood type ensures structural integrity and appropriate finish quality for your project.
| Type | Cost/Sheet | Use | Grade |
|---|---|---|---|
| CDX | $25-45 | Sheathing, subfloor | C-D |
| Sanded | $35-60 | Cabinets, shelving | A-C / B-C |
| Birch | $50-80 | Furniture, visible work | A-A / A-B |
| Marine | $70-120 | Boats, outdoor | A-A (waterproof) |
| OSB | $15-30 | Sheathing (alternative) | Structural |
Frequently Asked Questions
How many sheets of plywood do I need?
Divide total area by 32 square feet (area of a standard 4×8 sheet). Add 10% for waste and cuts. For example, 500 sq ft ÷ 32 = 15.6, plus waste = 17-18 sheets.
What are standard plywood sizes?
Standard sheets are 4×8 feet (32 sq ft). Also available in 4×4 and 4×10 feet. Thicknesses range from 1/4 inch to 1-1/8 inch. The most common thicknesses are 1/2 inch and 3/4 inch.
How much does a sheet of plywood cost?
CDX (construction): $25-45 per sheet. Sanded plywood: $35-60. Birch: $50-80. Marine grade: $70-120. OSB (oriented strand board): $15-30. Prices fluctuate significantly with lumber markets.
What type of plywood should I use for subfloor?
Use 3/4 inch (23/32) tongue-and-groove CDX or structural plywood. AdvanTech and LP Legacy are premium subfloor options. For below-grade applications, use pressure-treated plywood.
What is the difference between CDX and sanded plywood?
CDX is construction-grade with knots and rough surfaces — used for sheathing, subfloors, and hidden applications. Sanded plywood has smooth faces for visible use — cabinets, furniture, and finished surfaces.
How much does a sheet of plywood weigh?
A 4×8 sheet of 3/4-inch plywood weighs about 60-70 pounds. 1/2-inch weighs about 40-48 pounds. 1/4-inch weighs about 22-25 pounds. Hardwood plywood is heavier than softwood.
What is marine-grade plywood?
Marine plywood uses waterproof glue and higher-quality veneers with no voids. It’s designed for permanent water exposure — boats, docks, and outdoor applications. It costs 2-3 times more than standard plywood.
Can I use plywood for roofing?
Yes, 1/2-inch or 5/8-inch CDX plywood is standard for roof sheathing. OSB (7/16 inch) is also common and more affordable. Both need to be rated for structural use. Check local code requirements.
What is plywood grading?
Plywood is graded by face quality: A (smooth, paintable), B (solid with minor repairs), C (knots allowed, unplugged), D (large knots, defects allowed). A sheet rated ‘AC’ has one A face and one C face.
How do I calculate plywood for walls?
Measure wall height × length for each wall. Subtract openings (doors: 21 sq ft, windows: 15 sq ft each). Divide net area by 32 sq ft per sheet. Add 10-15% for waste from cutouts.