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Old 01-19-2013, 07:49 PM   #1
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What does the abbreviation OG mean. I've seen it in recipe instructions. Thanks

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Old 01-19-2013, 08:09 PM   #2
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Original gravity. The specific gravity (what you measure with your hydrometer) of the wort pre-fermentation. It is an indication of the amount of sugars in the wort and therefore the potential ABV. Actual ABV is calculated by comparing the OG to FG (final gravity, post fermentation) to see how many of those sugars actually got converted to alcohol.
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