The Jordanian Dinar has been the official currency of Jordan since 1950 when it replaced the Palestinian pound and is divided into 10 dirham, 100 qirsh (also called piasters) or 1,000 fils. This is why there are so many different Jordanian coins, including ½ qirsh, 1 qirsh, 2 ½ qirsh, 5 piasters, 10 piasters, ¼ dinar, ½ dinar and 1 dinar. The denominations for banknotes are 1, 5, 10, 20, 50 dinars. When arriving in Jordan it may be smart to break up some of your larger banknotes as it can sometimes be hard to pay for things in high value currency. If you are arriving from Israel know that no israeli shekels are allowed to be imported into Jordan and all other currencies must be declared. Also note when leaving Jordan the maximum amount of JOD you can take with you is 300.
Bottle of Water: 0.25 JOD
Beer: 5 JOD
Cappuccino: 2.25 JOD
Dinner at cheap restaurant: 5 JOD
Dinner at mid-ranged restaurant: 25 JOD