Currency in Slovakia is Euro (EUR). Euro is an official currency in Slovakia since 1st of January 2009. Any Euro coin is valid in any country of the Euro area. Slovak Republic adopted the Euro after 16 years of using Slovak Koruna. The conversion rate was 1 EUR = 30,126 Slovak Crown.uro is an official currency in Slovakia since 1st of January 2009. Any Euro coin is valid in any country of the Euro area.