Pevlika Browser Apps

Insulation Calculator

Insulation thickness for a target R-value, plus packages.

Runs in your browser — nothing is uploaded
Units
US R-value (ft²·°F·h/BTU). RSI × 5.678 = R.

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Material estimates only — add waste, confirm quantities with your supplier and follow local building codes. Not an engineering guarantee.

How to use Insulation Calculator

  1. Enter your values — the unit for each field is shown next to it.
  2. The result updates instantly as you type.
  3. Copy the results, or change inputs to compare scenarios.

Formula & assumptions

Thickness (in) = target R ÷ R per inch; RSI = R ÷ 5.678

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