CUI Devices' heat sink calculator can be used to quickly solve for a device's junction temperature, power dissipation, and heat sink-to-ambient thermal impedance ratings. To use the calculator, enter your known values into the appropriate fields, click calculate, and the converted junction temperature, power dissipation, or thermal impedance heat sink-to-ambient value will be shown. These calculated values can then be used to specify the proper heat sink in a design. For more information on heat sink design, view our heat sink selection tutorial.