Spray Foam Calculator

Enter your information into the spray foam insulation estimate calculator to determine how much foam you need for your project. A recommended thickness chart is shown at the bottom of this page.

Calculating how much spray foam insulation is needed for a home or building ensures optimal energy efficiency, proper coverage, and accurate project budgeting. By determining the correct board footage based on square footage and desired thickness, roofers, general contractors, and property owners can avoid material shortages, reduce waste, and maximize thermal performance. Accurate spray foam calculations also help improve building envelope integrity, lower energy costs, and ensure code-compliant insulation installation for residential and commercial projects.

Spray Foam Calculator

Total Area (ft²):

Cured Thickness (in):

Select your project type:

Calculation Results

Required Volume: --

Required Board Feet: --

Recommended Installed Thickness Chart
Application	Type of Foam	Thickness (inches)
Metal Buildings	Closed Cell, 1.75 lb.	0.5 - 2
Walls (Hybrid Installation)	Closed Cell, 1.75 lb.	0.5 - 2
Walls Non-Hybrid	Closed Cell, 1.75 lb.	2 - 3.5
Walls (Southern Climates or Sound Proofing)	Open Cell, 0.75 lb.	3 - 5.5
Ceiling Hybrid Installation	Closed Cell, 1.75 lb.	0.5 - 1
Roof (Attic Side Open Cell)	Open Cell, 0.75 lb.	5 - 6
Roof (Top side, flat roof)	Closed Cell, 2.5 lb.	1 - 2
Floor (Air Seal)	Closed Cell, 1.75 lb.	0.5 - 1
Floor (Air Seal & Insulate)	Closed Cell, 1.75 lb.	1 - 3
Crawl Space Walls (Air Seal)	Closed Cell, 1.75 lb.	0.5 - 1
Crawl Space Walls (Insulate)	Closed Cell, 1.75 lb.	1 - 2.5