[Gondring]

How would this compare to WW2 adjusted for inflation?

Based on

http://www.westegg.com/inflation/ (which cites Consumer Price Index statistics from Historical Statistics of the United States and the annual editions of Statistical Abstracts of the United States for inflation conversion)

and

http://the.honoluluadvertiser.com/peaceinthepacific/numbers (which cites the National D-Day museum for war costs),

I calculate that 3 trillion in 2010 dollars is about 86% of what was spent by the US to fight WWII (converting the 2010 dollars to 1945 dollars).

[Gondring]

Note that according to that website about WWII costs, our costs were nearly as much as Japan, Britain, France, and the Soviet Union combined.

[Pinetop]

Thanks for that calculation on the comparison with WWII.