It takes approximately 31 empty aluminum cans to equal 1 pound. As of 2014, the average weight of an empty aluminum can is 14.9 grams.
One pound is equal to 453.592 grams. In order to determine the number of cans required to add up to 1 pound, it is necessary to divide the number of grams in a pound by the weight of an individual can. The quotient is equal to 30.442, meaning that it is necessary to round up to the nearest whole number which is 31.
The weight of aluminum cans can vary and has changed over time. According to the Australian Aluminum Council, the average can weighed 16.55 grams in 1992. In 2001, the average weight decreased to the weight that is the average as of 2014.