Methanol as Proportion of Ethanol

% v/v


Use this calculator to determine the proportion of methanol expressed as ethanol in g/L.


Methanol is not a direct product of fermentation but is formed through the hydrolysis of pectin by naturally present enzymes in grapes. As pectin is primarily extracted from grape skins, red wines generally contain more methanol than white wines. Methanol is poisonous for human consumption. To ensure compliance, review results against the local appelation regulations for maximum permitted level of methanol concentration in wine, expressed as a proportion of the ethanol concentration or alcoholic strength.


  • Measuring Sugar content in grape juice (1997), Concepts in Wine Chemistry by Yair Margalit, Ph.D. - (The wine Appreciation Guild);
  • Methods for analysis of must and wines, by Amerine, M.A. (1980), (Wiley-Interscience New York);

This winemaking calculator is provided to you courtesy of NuVerge Canada Inc.


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