Thermal conductivity k
W·m−1·K−1
input
The thermal property triangle
Any two of these three quantities determine the third. Choose which one to solve for, then type the other two — or load a material to see typical values.
α = k / ρcp
Thermal conductivity k
W·m−1·K−1
input
Thermal diffusivity α
m2·s−1
solved
Volumetric heat capacity ρcp
J·m−3·K−1
input
Values shown for presets are representative room-temperature figures for illustration, not certified reference data — real specimens vary with purity, density, orientation and processing history. Note that this simplified model assumes an isotropic material; for layered or fiber-aligned materials, k and α are direction-dependent and the triangle must be applied separately along each axis.