At chart page of the currency pair, there are are also available, that calculates both bid and ask rates for the mid-market values.
Or use Universal Currency Calculator to check of currencies.
Issued buy the Bank of Indonesia who mints the rupiah in denominations of Rp 50, Rp 100, Rp 200, Rp 500, and Rp 1000 and paper currency notes in denominations of Rp 1000, Rp 2000, Rp 5000, Rp 10,000, Rp 20,000, Rp 50,000, and Rp 100,000.