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$1 Trillion

With several big spending plans brought up in the past few months, including Federal Reserve program to buy Treasury Securities as well as the Public-Private Investment Program, the total cost of these individual plans has been estimated to be as much as $1 trillion. This stack of cash - in $1 bills - would measure 67,866 miles, stretching approximately 2.72 times around the Earth’s equator.

If denominated in $100 bills, $1 trillion would be enough to fill 4.5 Olympic-sized swimming pools, with a total volume of 398,000 cubic feet. For comparison, there is only about $625 billion worth of $100 bills currently in circulation, according to the US Treasury bulletin, which would fill about 2.8 Olympic swimming pools.

Graphic: Paul Alvord for CNBC.com