U-Value Insulation Calculator

Calculate overall heat transfer coefficient U = 1/R_total for building envelope assemblies. Includes film coefficients, framing effect, and air gaps. Convert between U-value, R-value, and RSI (metric R). Energy code compliance check.

2D stress state at a point. All stresses in MPa.

σx — Normal Stress X (MPa)
σy — Normal Stress Y (MPa)
τxy — Shear Stress (MPa)
⚙ Mechanical Note: Results are based on standard textbook formulas and ISO/AASHTO references. Always verify critical designs with applicable codes (ISO 898, AASHTO 1993, AISC, Eurocode 3) and a qualified engineer.
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How to Use

Enter the values for the patient or scenario you are assessing. Calculate overall heat transfer coefficient U = 1/R_total for building envelope assemblies. Includes film coefficients, framing effect, and air gaps. Convert between U-value, R-value, and RSI (metric R). Energy code compliance check. Use the u-value result to inform your clinical assessment.

Frequently Asked Questions