If you are out of Mad Millie Vegetarian Rennet Tablets and need to use the Mad Millie Liquid Vegetarian Rennet for your cheese making (or vice versa), this is possible considering the equivalence below:
Each rennet tablet will coagulate 4 L of milk, while liquid rennet requires using 0.5 ml per litre
If your recipe calls for 4 Litres of milk and you are using liquid rennet in place of 1 rennet tablet, you will need to use 2 ml of liquid rennet to substitute the 1 rennet tablet.