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

The purpose with this work is to try and see an economic development on Gotland during the Viking Age, where society went from a weight-based economy, to a monetary economy with its own coins. The aim is to try and distinguish a pattern in the investigated depots. How has the deposit structure changed during the Viking era when it comes to the minted and unminted silver?   The research about the silver deposits aim on the dating of the coins in order to create an approximate closing period for the contents of the depots.   The development of the silver structural change in the silver depots during the Viking Age makes it possible to study how the dominance of the early Islamic coins, in both coin and fragmented form, is phased out to be replaced by mainly English and German coins. The English and German coins that are found on Gotland could be seen as a model for the coins and the minting that began at the end of the Viking Age on the island.