The aim of this study is to examine the possibility of calculating the total weight of coins in poorly documented Viking Age silver hoards found on Gotland. A method for calculating the total weight of the silver coins in the hoards, and thus the weight relationship between minted and un-minted silver, would facilitate further and deeper studies using the hoards from Gotland. The method will be based on the average coin weights obtained from numismatic sources. Two calculations, one of Arabic coins and another with mixed coin, is attempted. Apart from the calculations of the Viking Age coins, earlier studies of the relation between silver coins and silver object will be discussed in the earlier research. The different Viking Age coins in the calculation and the development of the Viking age minting will also be discussed in earlier research. The result of the study demonstrate that an estimated total weight could be calculated for the Arabic silver coins. Unfortunately the mixed coin hoards could not achieve a calculation that could estimate an equivalent total weight of the silver coins