9 calculators

Heat and Mass Transfer Calculators

Conduction, convection, radiation, heat exchangers, fins, and transient analysis

Calculate heat conduction through flat walls, cylinders, and spheres with multi-layer flat wall support

Calculate convective heat transfer Q = hA(T_surface - T_fluid) and solve for any unknown

Calculate radiative heat transfer Q = εσA(T₁⁴ - T₂⁴) with common emissivity reference values

Build series/parallel thermal resistance networks for conduction, convection, and radiation elements

Calculate fin efficiency and effectiveness for rectangular and annular fins using fin parameter m

Calculate log-mean temperature difference and heat transfer rate for parallel and counter-flow heat exchangers

Calculate NTU, capacity ratio, and effectiveness for parallel flow, counter flow, and shell-and-tube heat exchangers

Calculate transient temperature response and time constant with Biot number validity check

Calculate critical insulation radius for cylinders and spheres and determine if added insulation increases heat loss