IPC Standards

[LoL]

Great thank you I was looking only on IPC 2221. 2152 is newest ( https://www.ipc.org/ContentPage.aspx...able-in-German ).

Thank you.

[robertferanec]

For many calculations (including maximum current) we use Saturn PCB Toolkit (it's free). According to the website it: "Calculates the current a conductor needs to raise its temperature over ambient per IPC-2152."

[LoL]

- Do you have some calculator for determining trace width (or other important parameters) according to IPC standards ?
I have found this one ;
http://circuitcalculator.com/wordpre...th-calculator/

If I compare results from previous (which are input for the link bellow) I got different results :
http://www.eeweb.com/toolbox/externa...e-max-current/

What to do? Which one to trust?