Currency Conversion In Item Master

Can anyone please tell me how to do the currency conversion inside Item master doctype?

I have 2 fields, both of them are set to field type "currency ". Field_A is in EUR, I want it automatically convert to USD and show value in Field_B by not using a fixed currency conversion rate

currency conversion no inside in item master doctype.
what do you want “currency conversion in item master”? for what? i think its not use…

@komsel2228 , because my company is using one currency for buying and another currency for selling. I want to calculate the profit of each product in item master.

you can use pricelist and input your item price.