Batt Insulation Quantity Calculator

Coverage per bundle is printed on the label.

HVAC Pro calculator — inputs, formula and example are open to everyone.

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Formula

Bundles = area × (1 + waste%) ÷ coverage

Example calculation

1,000 ft² at 48.96 ft²/bundle + 10% waste → 23 bundles.

Practical HVAC use

Ordering material.

Common mistakes

Not deducting large openings — or deducting small ones.

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Educational tool. Results are estimates from the stated formulas; always confirm with manufacturer data and the code adopted in your jurisdiction. All calculators