No. 9 Alcohol content calculations

Taken from the calculations for No. 7:

OG 1.038 @ 25C, correction to 20C gives 1039
FG 1.010 @ 20C


ABW = (1.039 - 1.010) * 105 = 3.0%
ABV = 3 * 1.010 / 0.794 = 3.8%

Note: Correction to hydrometer readings of additional 0.002 to 0.003 per 10C over 20C.

For Adnams bitter that's about right! The book says OG 1036 but end at 1006, giving 4%, and another point is I've got about 25l but brewed aiming for 30l. Next time I'll add more sugar or grains, I think the sugar I've got (Dextrose/Glucose) is very light and when it says 'Use 30% more than normal sugar' it means this for brewing beer as well as other uses.

This afternoon I measured the FG again and it's still 1010 so fermentation is done, but it's very cloudy after moving. Will leave it another week or two in the cellar to clear, but as soon as it's clear I'll decant it into another barrel. Should really investigate dropping it down the stairs in a pipe, not carrying the barrel.