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Description
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 | Select the Alcohol and Attenuation command on the Tools menu. |
| Enter the starting (original) gravity of the wort and the final gravity of the finished beer. |
| Read the alcohol percentages, attenuation and calories calculated for this beer. |
| Starting Gravity - The original gravity of the wort, measured with a hydrometer usually as the beer is being moved from the brew pot to the fermenter. |
| Final Gravity - The final gravity of the finished beer, measured at bottling. |
| Percent Alcohol by Volume - The percent of alcohol content in the beer on a per-volume basis. |
| Percent Alcohol by Weight - The percent of alcohol content in the beer measured on a per-unit weight basis. |
| Apparent Attenuation - Attenuation is a measure of how much of the sugar was fermented by the yeast. Apparent attenuation is the unadjusted percent of sugars fermented by the yeast. For beer brewing, apparent attenuation is much more commonly used than real attenuation. It is defined as: |
Appt_Attenuation = (OG-FG)/OG * 100
where OG, FG are in points.
| Real Attenuation - The real attenuation is how much sugars were really fermented by the yeast. Because alcohol is lighter in specific gravity than water, an adjustment must be made for the alcohol content when assessing the actual percentages of sugar fermented. The real attenuation will always be a lower number than the apparent attenuation. |
| Total Calories per 12 oz - The total estimated calories for a 12 oz (0.35 L) glass of beer. |
| Cals from Alcohol per 12 oz - The number of calories due to alcohol. The remainder of the calories (i.e. Total minus alcohol calories) come from the carbohydrates and unfermented sugars in the beer. |
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