This calculator helps you understand how the boiling point of an ethanol-water mixture changes with alcohol content, based on the VLE (Vapour-Liquid Equilibrium) curve.
Enter the approximate alcohol percentage in the still pot and the calculator interpolates the estimated boiling/vapour temperature at 1 atm standard pressure.
Important: Results are for orientation only. Real readings are affected by ambient pressure, sensor calibration and placement in the column, which may be cooler than actual pot vapour.
As alcohol drops towards the end of a run, temperature approaches the boiling point of pure water (100°C).