How much is 9528 São Tomé and Príncipe Dobra to Guinean Franc? 3,676.41 Guinean Franc is todays conversion result. International currency exchange rate for pair STD to GNF for today is 0.3859. CNV.to is using the latest data from authority sources, data updates every minute. To calculate reversed currencies go to - 9528 GNF to STD.