Wax Weight to Metal Conversion:
  
Metals have different specific gravities. When casting you will know how much metal you will need so that you do not melt too little or waste to much. This calculator will tell you how much metal you will need according to the weight of your wax. Keep in mind, to get a good cast, you should double the amount of metal you need for the sprue.
  

Wax Weight (grams) =

Grams of 10K yellow gold
Grams of 14K yellow gold
Grams of 14K white gold
Grams of 18K yellow gold
Grams of 22K yellow gold
Grams of 24K gold
Grams of Platinum (pure)
Grams of Fine Silver
Grams of Sterling Silver

Grams of Pewter