This is an estimate of how heavy a typical 29" long arrow (with 100 grain tip, 4" vanes, w/inserts and nocks installed) would be if built from a particular arrow shaft.  Keep in mind, this is just an estimate intended to assist you in comparing the various arrow shafts.  If you want to be more precise, please visit our Custom Arrow Weight & FOC Simulator where you can input specific variables and account for a variety of arrow options.