SmartInsulationCalculator

All insulation calculators

Free, instant, no signup. Each one runs in your browser and gives you the exact unit you order in — bags, batts, board feet or dollars.

Insulation AreaWork out exactly how many square feet of insulation you need for a room, attic or wall assembly, including door and window deductions.Open R-ValueCalculate the R-value of any insulation thickness, see the DOE recommended R-value for your climate zone, and find how many more inches you need.Open Attic InsulationFind how many inches and how many bags of attic insulation you need to hit your target R-value, plus material and installed cost.Open Wall InsulationCalculate wall insulation for any stud wall: net square footage, number of stud bays, batts required and estimated cost.Open Blown-In BagsCalculate how many bags of blown-in cellulose or fiberglass insulation you need for your attic, plus depth, coverage per bag and cost.Open Batt & Roll QuantityCalculate how many batts, rolls or bags of fiberglass or mineral wool insulation your project needs, by bay size and coverage.Open Spray Foam Board FeetCalculate spray foam board feet, how many DIY kits you need, R-value achieved and cost for open-cell or closed-cell foam.Open Insulation CostEstimate insulation cost per square foot and total project price for batts, blown-in, mineral wool, rigid foam and spray foam — DIY or installed.Open Crawlspace InsulationCalculate crawlspace insulation: perimeter wall area, subfloor area, vapor barrier square footage and installed cost for a vented or encapsulated crawlspace.Open Basement InsulationCalculate basement wall insulation: wall square footage, rigid foam sheets, framing needed and total installed cost by R-value.Open Garage Door InsulationCalculate how many insulation panels or kits your garage door needs, the R-value you'll gain and what it costs.Open Rim Joist InsulationCalculate rim joist insulation: bay count, rigid foam cut sizes, spray foam board feet and cost for your basement band joist.Open Duct InsulationCalculate how much duct wrap you need for round or rectangular HVAC ducts, including overlap, foil tape and estimated cost.Open Floor InsulationCalculate floor insulation over a crawlspace or unheated garage: joist bays, batt count, R-value and installed cost.Open Rigid Foam BoardCalculate how many sheets of EPS, XPS or polyiso rigid foam board you need, the R-value of the layers and total cost.Open Radiant BarrierCalculate radiant barrier foil coverage for your attic roof deck, rolls needed, cost and estimated cooling savings.Open Pipe InsulationCalculate how many pipe insulation sleeves you need by pipe size and run length, including fittings, tape and cost.Open Water Heater BlanketSize a water heater insulation blanket by tank capacity, see the R-value you need and the annual energy savings it should return.Open SoundproofingCalculate acoustic insulation for a room: wall and ceiling coverage, panel counts, mineral wool batts and estimated STC improvement.Open Vapor BarrierCalculate vapor barrier plastic sheeting for a crawlspace, wall or floor including overlap, seam tape and cost.Open Ventilation & BafflesCalculate attic ventilation: required net free area, soffit and ridge vent split, and how many rafter baffles to buy.Open Energy Savings & PaybackEstimate the annual energy savings, payback period and 10-year return from an insulation upgrade, including rebates.Open Heat Loss (BTU)Calculate heat loss in BTU per hour through any assembly, compare before and after insulation, and see the annual fuel cost difference.Open U-Value ConverterConvert between U-value and R-value, imperial and metric (RSI), and add up the R-value of a layered wall assembly.Open Insulation Removal CostEstimate the cost to remove old attic insulation, including vacuum rental, bags, disposal fees and contractor pricing.Open Labor HoursEstimate how many labor hours an insulation job takes, how long it is with your crew size, and what the labor costs.Open Project TotalAdd up a whole-house insulation project: attic, walls, floors, air sealing, removal and labor into one total estimate.Open

Insulation gear worth owning

The tools and materials that show up on almost every insulation job.

Owens Corning R-19 Unfaced Fiberglass Insulation 77.5 Sq.ft (15 in x 93 in) 1 Batt

Owens Corning R-19 Unfaced Fiberglass Insulation 77.5 Sq.ft (15 in x 93 in) 1 Batt

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Owens Corning R-19 Unfaced Fiberglass Insulation 77.5 Sq.ft (15 in x 93 in) 1 Batt

Owens Corning R-19 Unfaced Fiberglass Insulation 77.5 Sq.ft (15 in x 93 in) 1 Batt

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BEEST FullStop Spray Foam Insulation Kit - 240 Board ft/sq.ft. Fire Rated Spray Insulation Foam for Walls & Attics with Thermal & Soundproofing - Includes 12x Cans, 1 Cleaner, Pro X Gun, Safety Gear

BEEST FullStop Spray Foam Insulation Kit - 240 Board ft/sq.ft. Fire Rated Spray Insulation Foam for Walls & Attics with Thermal & Soundproofing - Includes 12x Cans, 1 Cleaner, Pro X Gun, Safety Gear

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Respirator Mask with Filters set - Reusable Respirator Mask for Chemicals, Painting, Spraying, Epoxy Resin, Dust, DIY etc

Respirator Mask with Filters set - Reusable Respirator Mask for Chemicals, Painting, Spraying, Epoxy Resin, Dust, DIY etc

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PSI Woodworking DC3XX 1.5 HP Portable Dust Collector Motor Blower

PSI Woodworking DC3XX 1.5 HP Portable Dust Collector Motor Blower

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BLACK+DECKER Thermal Leak Detector (TLD100)

BLACK+DECKER Thermal Leak Detector (TLD100)

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