R-value, batts, blown-in bags, spray foam & real cost data — free on Android and the web.
Free insulation calculators for attics, walls, crawlspaces and more — estimate R-value, batts, bags, board feet and total project cost. Android app plus web ve… Built and supported by Dixon App Studio, this product is part of our wider lineup of simple, useful apps and web tools — designed to load fast, work reliably, and stay free of the clutter, popups, and subscription traps that ruin most modern software. Browse related products on our All Apps page, read practical guides on the blog, or jump into one of our free instant converters.
Every product on this site is built and maintained in-house by Dixon App Studio. We focus on speed, clarity, and longevity instead of chasing trends or paywalling features. If you need help with any of our apps, our support page lists contact details and answers to the most common questions.