Compute weight of sterling silver to volume of an ingot?

Hi, all - I’m definitely not the brightest bunny in the hutch and

need help to figure out the following:

Exactly how many weighed ounces/drams of sterling silver scrap would

melt to fill a certain volume of an [such as 70 x 40 x 4mm] ingot

mold?

There must be a forumulaout there, or a number that just tells you

how many weighed ounces/dwt whatever are in a mm3… Right?

Thanks - Bob