According to the U.S. Bureau of Engraving and Printing, a dollar weighs one gram. This is the same weight for every denomination of a U.S. note.
Since there are 454 grams in one pound, there are 454 notes in one pound. In addition, these currency notes are durable enough to withstand 4,000 double folds before tearing and are composed of 75 percent cotton and 25 percent linen, explains the Bureau. The green ink present on notes is very chemically resistant and the color represents strong and stable credit. The highest note that was ever printed was the $100,000 bill used only for Federal Reserve transactions in the 1930s.