All you need to know already is the volume of the mould you wish to use. You can get this 3 ways:
- Fill the mould with water & then tip the water into a measuring cup - the volume it fills to is the volume of your mould.
- Place the mould on some scales & zero the scales. Fill the mould with water - the grams displayed = mls of water.
- If you purchased your mould from B&V we have the approximate mould volume on every listing.