There are approximately 278 calories in each 12 fluid ounces of Great Lakes Christmas Ale this year, if my math is correct. Below are my calculations, if you would like to know how I came to this answer. To calculate the number on your own: grab a hydrometer, calculate the final gravity, plug your findings into the equations below, and let me know if I did it right!
First we need to find the original gravity:
Alcohol(by weight) = 76.08(OG-FG)/(1.775-OG)
7.5 = 76.08(x - 1.012) / (1.775 - x)
7.5(1.775 - x) = 76.08(x - 1.012)
13.3125 - 7.5x = 76.08x - 76.99
90.3025 = 83.58x
x = 1.080
OG = 1.080
Now, for the calories calculation:
C = 851(1.080 - 1)(1.080 + 3)
C = 851 * 0.080 * 4.080
C = 277.77
Historical Values:
