Attic Insulation Calculator
Get a personalized estimate for R-value targets, material costs, energy savings, and payback period — in under 2 minutes.
1
Location2
Home3
Existing4
DesiredStep 1 of 4: Location
Where is your home?
Your zip code determines climate zone, energy rates, and insulation targets.
Enter your 5-digit zip code
The most comprehensive free attic insulation calculator available online. We use IECC climate zone data, current energy rates by state, and real material pricing to give you accurate cost and savings estimates — no email or sign-up required.
Based on 2024 IECC code14 insulation materialsAll 8 climate zonesDIY & professional pricing