Insulation Calculator

Insulation type
Units
ft
ft

For walls, use the wall length and height. For a known total, enter it as the length and 1 as the width.

High cost: AK, CA, CT, HI, MA, NJ, NY, OR, WA, DC. Low cost: AL, AR, KY, MS, NM, OK, SC, TN, WV. All other states use the national average.

Blown fiberglass bags

23 bags

Chart rate per 1,000 sq ft: 19.0 bags

Quantities
Area to insulate1,200 sq ft
R valueR38
Total bag weight633 lb
Installed cost range
ItemLowTypicalHigh
Installed insulation$1,440$2,640$4,560

Planning estimate only, not a contractor quote. Prices are United States national ranges, updated October 2026. How these estimates are built

Calculator by Home Improve Guide