See where your house loses heat, then fix it for the right price
Free calculators for attic, wall, spray foam and crawl space insulation. Get the R-value your climate needs, how many bags, batts or board feet to buy, and what it costs to do it yourself or hire it out.
Check my atticAll 2 calculators
Guides
Attic & blown-in
Formulas you can check
Each calculator shows its formula and assumptions, and our methodology lists every source.
Numbers from the bag
Bag counts and depths come from manufacturers’ coverage charts; prices are dated and sourced.
Brand-neutral
We’re not affiliated with any manufacturer or retailer.