### Concrete Mix Ratios for Making Bricks with Moulds

How To Work Out The Concrete Mix For Your Mould. For ease of calculation, we work by volume and not weight. Thus 250ml of oxide would be 1 cup of powder, or 5ml would be one teaspoon. If using 1 Litre of cement, use an old 1 litre bottle and fill that. Once you have measured the volume you can use any container marked with what you need to use.