Insulation R Value Calculator
Calculate insulation r value with Calculator 360 using the available inputs.
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How to use this calculator
Calculate insulation R-value or convert between US R-value and SI RSI.
All dimensions, prices, product coverage, and allowances are entered by you. The result is an estimate under the assumptions shown.
Unit conversion: NIST Special Publication 811, Appendix B.8. References: NIST SI conversion factors ·
Frequently asked questions
What does this calculator estimate?
Calculate insulation R-value or convert between US R-value and SI RSI.
Are any product standards, live prices, or local rules assumed?
No. Enter the applicable values for your project or product.