Calculate the insulation bags or rolls needed by area and coverage per bag. Coverage varies by R-value and product.
Bags / Rolls
— bags or rolls
Rounded up.Usage Tip
Higher R-values usually mean thicker batts and less coverage per bag, so check the label rather than assuming.
THE MATH
bags or rolls = round up( area ÷ coverage per bag )
Insulation is rated by R-value for thermal resistance. The quantity is the area to cover divided by the coverage of one bag or roll, which the product label lists.
Enter the wall, ceiling, or attic area, choose the R-value for context, and enter the coverage per bag from the product label.
The result rounds up to whole bags or rolls.
The result rounds up to whole bags or rolls.