Hello- I have mainly traded soap for other handcrafts, thank you's, gifts and small sales to friends and family over the years. Its time to cost my soap out as people are asking more regularly. So far my brain has done best with using a spreadsheet method. I do not have a mathematical brain. That being said I am most likely overlooking an important step... I will provide the link below of the method i am using. i have read many a blogs about it and even have a formula in my books but this has been the one my head gets around best. [ame="https://www.youtube.com/watch?v=FqVNU9eN9DU"]https://www.youtube.com/watch?v=FqVNU9eN9DU[/ame] Question: when inputting all the figures i'm confused how someone who works in Kilos and grams bases weights off of oils bought in Liters/mls? How do i convert everything into grams? all oils weight differently but are still sold by the liter. I work/sell/caulculate in grams but buy in liters. Simple solution? I will look into soapmaker 3 at some stage, assuming it does this for me. Someone else told me to try an link that converts oil volume to weight http://convert-to.com/edible-cooking-oils-weight-volume-measures-conversion so thats an option. But when i moved overseas and started baking i often found these sites to be occasionally wrong.