Fin Thermal Resistance Calculator

All calculations performed using the following expression for the thermal resistance for fins and extended surfaces:

  1. Enter input values in the left table
  2. Browser will re-calculate when a change is made and the mouse is clicked in another box, the Tab key is pushed (Enter key for Unix), or the Calculate button is clicked.

Input Values
Fin Length - L (mm)
Fin Cross Sectional Area - A (mm2)
Fin Perimeter - P (mm)
Fin Material Thermal Conductivity - k (W/mK)
Base Contact Conductance - hc (W/m2K)
Fin Convection Coefficient - h (W/m2K)
Fin Tip Convection Coefficient - he (W/m2K)

Fin Tip Biot Number - Bie
Base Biot Number - Bic
Fin Biot Number - Bi
Fin Parameter - m L
Fin Thermal Resistance - Rfin ( oC/W)

Copyright 1997, Microelectronics Heat Transfer Laboratory