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R-Value to U-Value Conversion Calculator. Interactive, simple to use and effective. Helps with insulation maths. Get the right R-Value or U-Value first time.
Below, you will find a U-value to R-value calculator that automatically converts U-factors to R-values (just insert U, and get V). On top of that, you will also find a U-value to R-value chart for U-values ranging from U-0.01 to U-10.
Calculate the U-factor by using this formula: U-factor = 1/Sum of the R-values. Using the previous example with an R-value of 16, the U-factor is one-sixteenth, or 0.0625. Check your calculations by reversing the calculation and determining 1/U-factor.
R-Value measures how well a material resists heat flow, while U-Value measures how much heat is lost through a material. They are reciprocals of each other: U=1RU=R1 . Practical Implications. In building design, materials with high R-values are preferred for insulation to minimize energy loss.
This insulation calculator will help you determine the R-value of a selected material at a given thickness or the total R-Value of an entire barrier or wall made of different layers of materials at their respective thicknesses.
Calculates the assembly U-factor and compares it to the code minimum thermal performance criteria (maximum U-factors) in the 2012, 2015, 2018, and 2021 versions of the IECC, as well as the 2016, 2019, and 2022 versions of ASHRAE 90.1, which are climate dependant.
Easy to use converter to change between metric U-value and imperial R-value. Perfect if you have to work with different numbers of manufacturers of insulation materials like mineral wool, fiberglass, insulation panels, sheathings, boards, gladings, sidings, roofings and other building parts.
The CMHA R-Value/U-Factor Calculator is a spreadsheet-based calculator tool that determines steady state thermal properties of concrete masonry assemblies. Calculations can be performed for a wide variety of unit configurations, grouting schedules, and insulation types.
Calculate R-Values: The calculator computes the R-Values for each material. Sum R-Values: It sums up the R-Values of all layers, including air gaps and surface resistances. Determine U-Value: The calculator then takes the reciprocal of the total R-Value to provide the U-Value.
This calculator simplifies area-weighted R-value or U-value calculations. Inputs for R-value or U-value are imperial units only. Use it to find combined thermal resistance, based on the effect of multiple assemblies.