Insulation Calculator - Calculate Insulation Needed
Calculate insulation for walls, attics, or crawl spaces. Free calculator with R-value recommendations.
Insulation Calculator: Calculate insulation bags needed for your project.
Insulation Required
Bags Needed
26
blown-in insulation bags
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Insulation Requirements
Calculate by area and target R-value. Attics: R-38 to R-60. Walls: R-13 to R-21. Floors: R-25 to R-30. Choose insulation type and calculate bags needed.
Frequently Asked Questions
How much insulation needed?
Calculate area, determine R-value target, choose type. 1,000 sq ft attic at R-38 = 20-25 bags blown-in.
What R-value needed?
Attics: R-38 to R-60. Walls: R-13 to R-21. Floors: R-25 to R-30. Higher for cold climates.
How many bags insulation?
Blown-in covers 40-60 sq ft at R-30. Check bag coverage charts for specific products.
Can over-insulate house?
Exceeding R-values has diminishing returns but isn't harmful. Ensure proper ventilation.
Cheapest insulation?
Fiberglass batts cheapest ($0.50-1.50/sq ft). Blown cellulose cost-effective for attics.
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