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Understanding the World's Currency Units

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The eurozone β€” a currency shared by many countries

The eurozone is a striking case where more than 20 European Union member states gave up their own national currencies to share a single common currency, the euro β€” a rare global example of sovereign nations handing monetary policy to a shared institution, the European Central Bank (ECB).

Different currencies that all share the name dollar

The US dollar, Australian dollar, Canadian dollar, and Singapore dollar all use the word dollar, but they are entirely separate currencies with their own independent values and exchange rates.

The idea of a currency subunit

Many currencies pair a main unit with a subunit worth one-hundredth of it β€” the US dollar and cent, or the British pound and pence, for example β€” though in some currencies the legal subunit exists on paper but is essentially never used in everyday life.

Currencies with no subunit, or an unusual one

The Japanese yen circulates in practice as a whole-number currency with no meaningful subunit, while some currencies use a subunit worth one-thousandth of the main unit instead of one-hundredth β€” the Kuwaiti dinar's fils, for instance β€” showing just how varied currency structures can be around the world.

The historic European currencies the euro replaced

When the euro was phased in between 1999 and 2002, long-standing national currencies such as the German mark, the French franc, the Italian lira, and the Spanish peseta officially stopped circulating and passed into history.

Unusual denominations and top-value banknotes

The real value of the highest-denomination banknote varies enormously from country to country β€” some issue very high face-value notes to match domestic price levels, while others, such as Switzerland, tend to keep circulation weighted toward smaller-value notes.

Every currency unit carries its own history

A country's currency unit is more than just a name β€” it often reflects that country's history and, in cases like the euro, the story of regional integration. Recognizing that currencies sharing a name can still be completely different currencies helps avoid confusion.

Curious how currencies are protected from counterfeiting?

If you would like to know how banknotes around the world are actually made and protected, a companion guide on anti-counterfeiting technology in currency covers that ground.

Frequently Asked Questions

Are there European countries that are not part of the eurozone?

Yes β€” the British pound and the Swiss franc are two well-known examples of countries that are either outside the EU or that remain EU members but have kept their own national currency instead of adopting the euro.

Are a currency's unit and its symbol the same thing?

They are related but different concepts: the currency unit is the name of the currency itself (dollar, euro, yen, and so on), while the currency symbol is the shorthand mark used to represent it, such as $, €, or Β₯.