ONE FORMULA, ONE ANSWER
Plane Wall Conduction Calculator
Check heat conduction through a wall or insulation specimen. Choose input units and calculate one value within the stated conditions.
Inputs
Calculations run in this browser. Scientific notation such as 1.2e-3 is supported. Do not group thousands.
Result
Wall conduction heat transfer rate Q̇
Enter values and select Calculate.
Q̇ = k A ΔT / L
Assumptions
Use k,A,L>0. Assume steady one-dimensional conduction with uniform properties. Contact resistance, internal heat generation and edge losses are excluded. A temperature difference in K equals the difference in °C; absolute temperatures are different.
Displayed values are floating-point approximations. Measurement uncertainty and design safety factors are not calculated.
Formula references and credits
NaNa Lab created the code, descriptions, icons and preview images. Text, figures and code from the linked references have not been reproduced.
Physical constants: NIST / CODATA 2022. The values of μ₀ and ε₀ are measured recommendations, not exact defining constants. Values and precision notes are in the source record.
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