Technical Abstract: Gel, liquid crystal, and cubic phases have been used to explain some properties of lipid molecules. The cubic phase explanation can be applied to explain the stoichiometry of stearic acid (SA) solubility. A saturated solution is the maximum packing within a volume of liquid that can exist without forming a solid phase. SA solubility was investigated in five structurally diverse organic solvents at six temperatures. At 55 degrees C near both the melting point of SA and the boiling point of the solvents, in four of the five solvents, the data demonstrates that the solvent molecules and SA each occupied a comparable amount of space. Molecular mechanics calculations indicate 25 columns of SA pack uniformly and align as aggregates held together by van der Waals forces. In a range of hydrophilic and hydrophobic organic solvents, with the exception of acetonitrile, each replaces individual columns of SA in the cubic phase with solvents. The lower the temperature is from the solvent boiling point and the SA melting point, the more solvent/solvent interactions define intermolecular forces and molecular packing. SA in the cubic phase appears to orient solvent molecules parallel to SA by van der Waals forces. The same explanation does not work with acetonitrile because it appears to strongly disrupt the cubic phase of SA.