Insulation Calculator

Calculate insulation materials needed for walls, ceilings, floors. Supports fiberglass, mineral wool, foam boards, spray foam, and loose-fill insulation.

Calculate Insulation Requirements

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Results

Select an insulation area and material to calculate material requirements

Area Visualization

R Insulation Area

What is Insulation Calculator

Good insulation makes a real difference in comfort, energy use, and heating costs. But figuring out how much insulation you need can feel confusing, especially with so many material types and thickness options available.

This Insulation Calculator is built to make the process simple. You choose the area you're insulating, enter the measurements, select the insulation type, and the calculator gives you a clear estimate of how much material you'll need.

The layout is clean and easy to follow. Visual guides help you enter the right measurements, and the results are shown in a practical way, including how many packs or rolls to buy. There's also an option to include extra material for waste, which helps avoid shortages during installation.

This tool works for both small home projects and larger renovation jobs. It supports different units, common insulation materials, and multiple thickness options, making it useful in many situations.

Whether you're improving energy efficiency or working on a new build, this Insulation Calculator helps you plan accurately and move forward with confidence.

How to Use the Insulation Calculator

1

Choose Insulation Area

Select walls, ceiling/attic, floor, or enter a custom area size.

2

Select Material Type

Choose from fiberglass batts, mineral wool, foam boards, spray foam, or loose-fill.

3

Get Material Estimate

Receive insulation quantity, number of packs/rolls, and coverage details.

Understanding Insulation Materials

Common Insulation Types

Material Type Best For R-Value Range Typical Waste
Fiberglass Batts Walls, ceilings, floors R-2.9 to R-4.3 10-15%
Mineral Wool Walls, ceilings, fire-rated areas R-2.8 to R-4.2 8-12%
Foam Boards Exterior walls, foundations R-3.6 to R-8.0 5-10%
Spray Foam Irregular spaces, air sealing R-3.6 to R-6.0 5-10%
Loose-fill Attics, hard-to-reach areas R-2.5 to R-4.0 15-20%

Note: R-values vary by material density, thickness, and installation method. Local building codes may specify minimum R-values for your area.

R-Value and Insulation Thickness

R-value measures thermal resistance - higher R-values indicate better insulating performance. The thickness required depends on your local climate, building codes, and energy efficiency goals. Always check local building regulations for minimum insulation requirements.