What does a U.S. debt clock show?

A U.S. debt clock shows a constant running total of the national debt, and reflects several financial categories, such as debt per person, unfunded liabilities and money creation. The clock essentially reflects the financial state of the country at any given moment in time.

As of 2015, there are several versions of U.S. debt clocks, such as those on USDebtClock.org and NationalDebtClocks.org. Most debt clocks show a continuous running sum of the national debt, but some display various other financial components, such as overall revenues, total spending, Medicare spending, debt per family and interest on the debt. As of 2015, the U.S. national debt stands at just over $18 trillion.