Heat Sink Thermal Resistance Calculator

Use this heat sink thermal resistance calculator to estimate temperature rise across the base, thermal interface material (TIM), and fin section. It allows engineers to compare thermal resistance for solid aluminum or copper bases versus vapor chamber bases by entering power input, material properties, and airflow conditions—supporting better thermal design decisions.

If you are unsure of roughly how large a heat sink is needed, click here to see a different heat sink calculator that will help estimate the total heat sink volume.

Numerous variables have been fixed or limited. Engineers needing heat sink calculations driven by variables that fall outside the input parameters are encouraged to contact our technical teams from the Request a Quote page. CLICK here for a guide on how to use the heat sink calculator.