Simply add up the weights/volumes of all the ingredients to get a total. You can then divide that amount by the size of your container. For example, if a lip balm recipe contains a total of 30g of ingredients, that will make 30g of lip balm. Lip balm containers typically hold 4.5g of lip balm, so 30/4.5= 6.66, meaning you will fill just under 7 lip balm tubes with that recipe. That same 30g recipe would fill one 30g/1oz tin.
A lotion recipe that uses 100g of ingredients will amount to just under 125mL/half a cup of lotion.
You can also look at the size of the package I recommend; that’ll give you a pretty good idea.
Posted in: Measurements