Thermal Diffusivity Calculator
Compute α from thermal conductivity, density, and specific heat.
Instructions
Enter material thermal conductivity, density, and specific heat. The result shows how fast heat diffuses through the material.
Formula
α = k / (ρ c)
About Thermal Diffusivity
Materials with high α respond quickly to temperature changes; low α materials are more insulating or have greater thermal inertia.
Common Questions
Units check
Ensure k in W/m·K, ρ in kg/m³, c in J/kg·K; α will be in m²/s.
Temperature dependence?
k and c can vary with temperature; this calculator assumes constants.