sgd to idr1 SGD = 12,676.7785 IDR Exchange rates may vary. Fees may apply. Singapore Dollars to Indonesian Rupiahs: exchange rates SGD. IDR. 1 SGD, 12,628.63 IDR.Convert Singapore Dollars to Indonesian Rupiahs with the latest mid-market rate. See historical charts, rate alerts, and other currency tools from Xe, the world's most trusted