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If you mean how many WEIGH a pound, and not how many are in a British pound, all US paper bills weigh 1 gram. A pound is about 454 grams so you'd need 454 bills to weigh a pound.
One US dollar bill weighs about one gram, so 1,000 dollar bills would weigh about 1 kg (2.2 lbs). Since a twenty-dollar bill is common, this would be the weight of 50 twenty-dollar bills.
One U.S. $20 bill weighs one gram. That makes 50,000 $20 bills to make $1 million, which would weigh 110.23 pounds.
40 lbs
/* My wife says 4 a quarter pound each */Correction454. Modern US bills weigh 1 gram each. A US pound is equivalent to just under 454 grams.
100,000.00 USD in 20-dollar bills would weigh approximately 220.46 lbs (99.89 kg). Each bill weighs about 1 gram, and there are 453.59 grams in a pound.
US bills weigh 1 gram. There are approximately 453.59 g in a US pound. So either the answer is $453.
If you mean "how many 100 bills weigh a pound", the answer is slightly more than 453. The standard weight of all US bills is 1 gm and there are 453.6 gm in one US pound.
A pound.
US bills weigh approximately 1 gm each. A US pound weighs 453.6 gm so one pound (except for the 0.6 gm!) of them would be worth 453 x 20 = $9060.
US bills weigh 1 gm each but a US pound is 453.6 gm. Rounding up to the next whole number of bills gives 454 bills, each worth $100 for a total of 454 x $100 = $45,400