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.This chart shows SGDIDR exchange rate history data for 2019. The SGDIDR rate is down -2.33% in 2019. This means the Singapore Dollar decreased in value compared to