Application-specific waste, T&G loss, gap allowance & fastener takeoff
Application
Straight walls: standard cut allowance applies.
Sheet Size & Framing
Recommended panel: 7/16″ OSB for wall sheathing at 16″ O.C.
Waste & Gap Allowance
Auto-set from your application above — feel free to override.
Fasteners & Adhesive
Standard code minimum is 6″ on panel edges, 12″ in the field tighten up for high-wind or seismic zones per your local code.
Cost Estimate
Please enter a valid project area first.
Total Sheets Needed
–sheets
Enter your project details and calculate to see results.
Fastener Takeoff
Real-World Purchasing Equivalents
Project Inputs
Estimates are approximate and based on standard APA span-rating rules of thumb. Panel thickness, clip, and fastener spacing recommendations always require confirmation against your local building code and stamped engineering plans before ordering or installing.
Four inputs are all it takes to get your sheet count with QuickTonnage's plywood calculator.
Plywood and OSB thickness isn't one-size-fits-all the right panel depends on what you're building and how far apart your framing is. Here's a quick reference:
| Application | 16″ O.C. | 24″ O.C. |
|---|---|---|
| Wall sheathing | 7/16″ OSB | 15/32″ (1/2″) OSB |
| Roof sheathing | 7/16″ OSB | 19/32″ (5/8″) OSB, plus H-clips |
| Subfloor (T&G) | 23/32″ (3/4″) T&G | 1-1/8″ T&G |
A couple of things trip people up here. First, plywood sizing is nominal, not actual a sheet labeled 3/4″ often measures closer to 23/32″ once you check it with calipers. Second, roof sheathing at wider framing spacing (24″ O.C.) usually needs H-clips between panels, since the unsupported edge is more likely to flex without one.
QuickTonnage's sheathing calculator applies this table automatically once you set your project type and framing spacing, so you're not cross-checking a chart by hand.
Divide your total area by the coverage of one sheet (32 sq ft for a standard 4x8), then add a waste allowance 5 to 8% for walls, 10 to 15% for roofs. QuickTonnage does this math for you, including the extra sheets that gap and T&G loss add in.
A standard 4x8 sheet covers 32 square feet.
7/16″ OSB is standard at 16″ on-center rafter spacing. At 24″ on-center, most codes call for 19/32″ (5/8″) along with H-clips between panels.
It varies by supplier and thickness, so there's no single number QuickTonnage lets you enter your own bundle size to get an accurate count for your specific order.
Yes, in practice. Plywood is sold by nominal thickness, so a panel labeled "3/4 inch" typically measures 23/32″ when you actually measure it.
It depends on thickness and whether it's plywood or OSB a 1/2″ sheet weighs less than a 3/4″ sheet of the same material. Check your specific panel's spec sheet for an exact number, since weight varies by manufacturer.