How much is 3299 Guinean Franc to São Tomé and Príncipe Dobra? 8,580.20 São Tomé and Príncipe Dobra is todays conversion result. International currency exchange rate for pair GNF to STD for today is 2.6008. CNV.to is using the latest data from authority sources, data updates every minute. To calculate reversed currencies go to - 3299 STD to GNF.