Insulation Calculators
Calculate how many bags of batt insulation you need for a wall or attic.
Calculators
Which measurement should I take first?
Measure the total square footage of the wall or attic area you're insulating, then confirm the R-value you need for your climate zone and the stud/joist spacing (16" or 24" on center) — batt width depends on that spacing. Framing calculators on this site share the same wall-dimension inputs if you're insulating a wall you've just framed.