The currency of Jordan is the Jordanian dinar (JOD, د.ا), which is divided into 100 qirsh (sometimes called ‘piastres’) or 1000 fils. You’ll find bank notes in denominations of 1, 5, 10, 20, and 50 dinar, as well as coins in denominations of 1, 2.5, 5, and 10 piastres and 0.25, 0.5, and 1 dinar.
You can withdraw local currency from ATMs in all towns and cities, big and small. Credit cards are widely accepted in Jordan but you may struggle to use them in more remote rural areas like the desert.