Insulation Calculator

Select your desired R-value and enter the area to insulate. Compare quantities and costs across fiberglass batt, blown-in cellulose, blown-in fiberglass, and mineral wool.

Desired R-Value

Area to Insulate (sq ft)

Available Thickness (in)

Waste Factor (%)

Pricing (edit to match local rates)

Fiberglass Batt / Roll ($)

Cellulose / Bag ($)

Blown-In FG / Bag ($)

Mineral Wool / Pack ($)

Adjusted Area

1100 sq ft

1000 sq ft + 10% waste

Target R-Value

R-19

Selected insulation grade

Cheapest Option

Blown-In Fiberglass

$154.00

Units Needed

11 bags

Blown-In Fiberglass

Purchase Option	Quantity	Est. Cost
Fiberglass Batt (6.25" depth)	15 rolls	$675.00
Blown-In Cellulose (5.25" depth)	14 bags	$168.00
Blown-In Fiberglass (7" depth)Best value	11 bags	$154.00
Mineral Wool Batt (5.5" depth)	23 packs	$1,495.00

Cheapest option: Blown-In Fiberglass at $154.00Blown-in fiberglass fills gaps and irregular spaces effectively. It does not settle as much as cellulose over time.

Thickness ConstraintThe cheapest option (Blown-In Fiberglass) requires 7" of depth, which exceeds your available 6". The cheapest option that fits is Blown-In Cellulose at $168.00.

This is a material estimate only. Actual coverage varies by manufacturer, installation density, and cavity conditions. Always check local energy codes for minimum R-value requirements and consult manufacturer specs for exact coverage per unit.