Subfloor Calculator

Enter your floor dimensions and panel type to calculate how many sheets of plywood or OSB subfloor you need, plus adhesive and fasteners — with a side-by-side cost comparison.

Subfloor Calculator

Floor Length (ft)

Floor Width (ft)

Waste Factor (%)

Pricing (edit to match local rates)

3/4" T&G Plywood ($/sheet)

3/4" T&G OSB ($/sheet)

5/8" CDX Plywood ($/sheet)

Adhesive ($/tube)

Ring-Shank Nails ($/lb)

Floor Area

1,120 sq ft

39 sheets of 3/4" T&G Plywood (incl. 10% waste)

Adhesive

10 tubes

1 tube per 4 sheets (~128 sq ft)

Ring-Shank Nails

20 lbs

~1 lb per 2 sheets

Best Total Cost

$1,252.00

3/4" T&G OSB

Purchase Option	Quantity	Est. Cost
3/4" T&G Plywood	39 sheets	$1,915.00
3/4" T&G OSBBest value	39 sheets	$1,252.00
5/8" CDX Plywood	39 sheets	$1,525.00

Cheapest option: 3/4" T&G OSB at $1,252.00This total includes panels, subfloor adhesive, and ring-shank nails for 1,120 sq ft. OSB is the most affordable option. It performs well in dry conditions but is more susceptible to moisture swelling than plywood.

Moisture consideration for OSBOSB can swell at the edges if exposed to standing water during construction. If your subfloor may sit uncovered for weeks, consider upgrading to plywood or using a moisture-resistant OSB product like AdvanTech.

This is a material estimate only. Actual sheet count may vary depending on floor layout, joist direction, and staggering pattern. Always order a few extra sheets for cuts and waste.