official exchange rate
noun[C]
ukusECONOMICS,FINANCE
theofficialrateat which thecurrencyof onecountrycan beexchangedfor thecurrencyof anothercountry:
Figures for non-U.S.companieshave beenconvertedto U.S.dollarsat theofficialexchangerateat each company'sfiscalyear-end.