Insulation Calculator
What are you insulating?
Walls — length x height
Attic floor or ceiling — length x width
Total wall length
feet
inches
meters
cm
Add up the walls being insulated.
Wall height
feet
inches
meters
cm
Doors
21 sq ft each
Windows
15 sq ft each
Length
feet
inches
meters
cm
Width
feet
inches
meters
cm
Framing spacing
16 in on centre
24 in on centre
Coverage per bag (sq ft)
Printed on the bag — R-13 is often ~106, R-30 ~58.
Calculate
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