Share 'Volume and weight of chocolate'

Is there a way to work out mold size from weight? Essentially I am looking to have mold made for 75 grams and require a certain thickness. I realised I don't actually know the weight/volume ratio of chocolate so can't work out the exact dimensions of the mold.  Does anyone have a formula for this or at least know the volume of 100g of chocolate so I can work it out from there?  Another one of…