R-Value Calculator
Calculate thermal resistance (R-Value) for your insulation project. Determine the effectiveness of insulation materials and optimize your home’s energy efficiency based on your specifications.
Step 1: Insulation Measurements
Understanding R-Value
R-Value measures thermal resistance – the higher the number, the better the insulation. It indicates how well a material resists heat flow. Higher R-Values mean better insulation performance.
Step 2: Material & Calculation
About Climate Zones
Climate zones determine recommended R-Values for optimal energy efficiency. Colder climates require higher R-Values to maintain indoor temperature and reduce heating costs.
R-Value Calculation Results
Total Thermal Resistance
Insulation Type R-Value Comparison
| Insulation Type | R-Value per Inch | Total R-Value (6″) | Effectiveness |
|---|
Energy Efficiency Impact
R-Value Calculation Formula
Total R-Value = (Insulation Thickness × R-Value per Inch) + Existing R-Value
To calculate total thermal resistance: Multiply insulation thickness (inches) by the material’s R-Value per inch, then add any existing insulation R-Value.
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