R-value, batt, spray foam, and blown-in insulation calculators. Browse our free insulation tools below — all calculators are instant, accurate, and require no sign-up.
Attic Insulation Depth Calculator — Calculate how much additional attic insulation depth you need. Enter current and target R-values to determine the inches of new insulation required to meet code.
Acoustic Insulation Calculator — Calculate sound insulation materials for walls and ceilings. Enter wall area and target STC rating to determine insulation quantity for effective noise reduction.
Blown-In Insulation Calculator — Calculate bags of blown-in insulation for attics or walls. Enter area, desired depth, and coverage per bag to estimate material for cellulose or fiberglass loose-fill.
Batt Insulation Calculator — Calculate the number of batt insulation rolls or bags needed. Enter wall area, cavity depth, and R-value to determine fiberglass or rock wool batt quantities.
Duct Insulation Calculator — Calculate insulation area for HVAC ducts. Enter duct dimensions and lengths to determine the total surface area for duct wrap or duct board insulation.
Crawl Space Insulation Calculator — Calculate insulation for crawl spaces. Choose between floor insulation or wall insulation approaches and estimate material for your crawl space dimensions.
Insulation R-Value Calculator — Determine the recommended insulation R-value for your climate zone. Enter your ZIP code zone and building component to find the required R-value per IRC energy code.
Heat Loss Wall Calculator — Calculate heat loss through walls using the Q = A × ΔT / R formula. Enter wall area, R-value, and temperature difference to determine BTU/h heat transfer rate.
Pipe Insulation Calculator — Calculate linear feet of pipe insulation needed. Enter pipe runs by diameter to determine the total length of foam or fiberglass pipe insulation sleeves required.
Insulation Vapor Barrier Calculator — Calculate rolls of vapor barrier for insulation projects. Enter surface area to determine polyethylene sheeting needed, including overlaps at seams and edges.
Rigid Foam Board Calculator — Calculate how many rigid foam insulation boards you need. Enter area and board size to determine sheet count for XPS, EPS, or polyiso rigid insulation projects.
Spray Foam Insulation Calculator — Calculate spray foam insulation needs in board feet. Enter area and thickness to estimate kits or professional product quantities for open-cell or closed-cell foam.
Wall Insulation Calculator — Calculate wall insulation needed after subtracting windows and doors. Enter wall dimensions and openings to determine net insulation area by framing cavity depth.