Where do the rates come from?
Rates are the European Central Bank's daily reference rates, served by the Frankfurter API. They are mid-market reference rates, not the buy/sell rates at a money changer or bank, which always include a spread.
- Rates exist on European business days. If you pick a weekend or holiday, the previous business day's rate is used, and the date used is shown in the result.
- Data starts on 4 January 1999. The Saudi riyal (for Hajj and Umrah) is not available from this source.
- When you choose a date, only the currency pair and date are sent from your browser to the Frankfurter API; your amount is not sent.
Reading the change
If 1 US dollar rises from Rp9,000 to Rp16,000, the dollar gained 78% against the rupiah, or the rupiah weakened. That affects imported goods, dollar loans, tuition and travel abroad.
Frequently asked questions
Is this the buy or the sell rate?
Neither. It is a mid-market reference rate. Bank and money changer buy/sell rates are usually a little worse.
Why is the date different from the one I picked?
The ECB only publishes rates on business days. On weekends and holidays the previous business day is used.
Can I convert between currencies other than rupiah?
Yes. Pick any origin and target from the list, for example euro to dollar.
Why is the chart not daily?
For long ranges the data source returns weekly or monthly points so the page stays light.
Results are simulations to help planning and may differ from official calculations by agencies, employers or banks. Last updated 2026-11-04.