Calculate the amount of eco-friendly cellulose insulation needed for your project. Get bag counts, thickness, and cost estimates.
Ready to calculate
Enter your project details
Attics
Most common DIY method
Walls
Professional application
New construction
Adheres to surfaces
Why expert review matters
Every calculator is reviewed by certified professionals to ensure accuracy.David Chen's Master Mason, Licensed GC certification ensures professional-grade precision.
Is cellulose insulation safe?
Yes, it's treated with borates for fire and pest resistance, and is non-toxic
Can I install it myself?
Yes for attics using dry blow method. Rent a blower from home improvement stores
How does it compare to fiberglass?
Similar R-value but better air sealing and made from recycled materials
Our cellulose insulation calculator determines the thickness needed based on your target R-value (minus any existing insulation). Cellulose provides approximately R-3.7 per inch. We then calculate the number of bags needed based on your area and selected application method.
Formula
Thickness = (Target R - Existing R) ÷ 3.7
Bags = Area × Thickness × 0.007 (adjusted for method)