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Insulation coverage calculator

Count batts, rolls, or bags from wall and attic area and the coverage you type.

Units (required)

The same unit for the areas and the coverage.

Piece (required)

A label for the result. The count uses the coverage either way.

sq ft

0 is allowed if the attic has area.

sq ft

0 is allowed if the wall has area.

sq ft

The square units one batt, roll, or bag covers. You type it.

A label only, such as 20 or 3.5. It does not change the count.

Result

Insulation coverage calculator

Units (required)
Square feet
Piece (required)
Batts

Pieces

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Enter the wall area, the attic area, the coverage, and the R-value label.

Ballpark estimate, check before you buy or quote.

Coverage is the number you type for the product you chose. The page has no coverage table. Verify with your local code or a professional.

Estimate for planning only. This is not tax, legal, accounting or financial advice. Results depend on the figures you enter. Check all numbers, rates and rules with the official source or a qualified professional before relying on them.

How this works and common questions

About this tool

Each area is divided by the coverage you type and rounded up on its own. The R-value is the label you type. It does not change the count.

How it works

Wall pieces are the wall area divided by the coverage you type, rounded up. Attic pieces are the attic area divided by the same coverage, rounded up. The total adds those two counts. The R-value is stored as a label.

Rules

There is no built-in coverage table. Verify with your local code or a professional. Ballpark estimate, check before you buy or quote.

Questions

How many pieces?

Wall area divided by the coverage you type, rounded up, plus attic area divided by the same coverage, rounded up.

What does the R-value do?

It is the label you type. It does not change the count.

What is the example?

1,000 square feet of wall and 500 square feet of attic at 40 square feet per piece is 25 plus 13, which is 38 pieces.

Do I need an account?

No. The tools work without one. You only need to sign in to save your work.

Is what I type saved?

No. Nothing is saved unless you sign in and choose Save. Otherwise it stays on the page.

Do you show ads or sell my information?

No. We show no ads and we do not sell your information.

Is this tax or legal advice?

No. Results are estimates for planning. Check rates and rules with the official source or a qualified professional.

Sign in to save this. Your entries stay on screen.

Estimate for planning only. This is not tax, legal, accounting or financial advice. Results depend on the figures you enter. Check all numbers, rates and rules with the official source or a qualified professional before relying on them.