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 SGDIDR Chart lets you see this pair's currency rate history for up to 60 days. uses hhly accurate, actual street rates of money changers. Best money