Need to know about trace width calculations for internal and eternal layer

In ki-CAD calculator tools, there is an option to calculate the internal and external layer trace width calculations.
What is mean by external layer (Top and bottom layer??)
Internal layer means (Layer 2,34…)?
Could anyone clarify how to calculate trace width for TOP layer??
Suresh (+91-9688446071)

Top (and bottom) are on the outside of the PCB stackup so are external.

Please don’t put your contact details on a forum like this - you are very likely to get this spammed or worse.


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