Insulation Board Calculator
We'll adjust units, stud spacings, and insulation ratings based on your region.
Select the part of the building you want to insulate.
Enter the total area directly, or calculate it from room dimensions.
Choose the spacing between your wall studs, ceiling joists, or floor joists.
Choose the thermal resistance level for your insulation. Higher values mean better performance.
Our free insulation board calculator helps you estimate the number of rigid foam insulation panels needed for your project. Rigid boards are ideal for continuous insulation on foundations, walls, and roofs.
Getting your insulation quantities right the first time saves money and multiple trips to the store. Our calculator takes the guesswork out of insulation planning by providing accurate estimates based on your specific project dimensions, stud spacing, and target R-value. Whether you are a DIY homeowner or a professional contractor, this tool streamlines the estimation process.
Measure the total area to cover, then divide by the area of one board (typically 4x8 ft = 32 sq ft). Add 10% for cuts and waste. Our calculator automates this process.
EPS provides R-3.6 to R-4.2 per inch, XPS provides R-5 per inch, and polyisocyanurate (polyiso) provides R-6 to R-6.5 per inch.
Yes, rigid foam boards are excellent for continuous exterior insulation. They reduce thermal bridging through studs and significantly improve overall wall performance.
Stay informed with expert tips on insulation, energy efficiency, and home improvement.
Proper home insulation is one of the most impactful upgrades you can make for energy efficiency. In this comprehensive guide, we cover everything from choosing the right insulation type—fiberglass batts, blown-in cellulose, spray foam—to understanding R-values and local building codes.
Read More →
R-value measures how well insulation resists heat flow. A higher R-value means better thermal performance and greater energy savings. But what R-value do you actually need? The answer depends on your climate zone and local building requirements.
Read More →
Your attic is the single biggest source of heat loss in most homes. Properly insulating it can reduce heating costs by up to 30%. From sealing air leaks around recessed lights to choosing between blown-in and batt insulation, these expert tips will help you.
Read More →