Spreading Resistance Calculator

This calculator compares the spreading resistance (delta-T) of an aluminum or copper solid metal base used in heat sinks to a vapor chamber base alternative. Desired base thickness can be input separately for each type of material/device.

Generally, solid metal heat sinks with spreading resistances in excess of 10 degrees Celsius are good candidates for vapor chamber or heat pipe designs, although other factors such as weight or base thickness may come into play.

Several vapor chamber variables such as wall thickness, wick thickness, and wick porosity have been fixed. Engineers needing vapor chamber thermal solutions that fall outside the calculated parameters are encouraged to contact our technical teams from the Request a Quote page.

As with any model, we strive to be as accurate as possible. Yet, it’s just a model.