First of, sorry of the question is not for here, but I can't seemk to find more proper place... My question is, how much lemons are needed to produce 1 kilogram pure essential oil, not the method with olive oil, but pure one, with only lemons?
I haven't personally tried making lemon essential oil. But according to Young Living, an MD named Jean Valnet estimated that it takes 3,000 lemons to produce one kilo of Lemon essential oil. Here are some links to the estimations (keep in mind that a kilogram is roughly 2.2 lbs):
I am not sure how definitive this is, but it states that the rinds of 1500 lemons are required to make one pound of lemon essential oil http://www.everygreenherb.com/lemon.html
For a kilogram, you would need the rinds of around to 3300 lemons.