approx 112 boards better get 115 to be sure.
There are 453.59237 grams in one pound. Therefore to get amount of grams in pounds, value in pounds has to be multiplied by amount of grams in one pound:2.5 pounds = [pounds] * 453.59237 = 2.5 * 453.59237 = 1133.9809 grams2.5 lbs = 1 133.980925 grams on earth. http://www.onlineconversion.com/weight_all.htm