Dave's Dreaded Homebrew Calculator
Dave's Dreaded Brewing
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The critical brewer will want to be able to discern subtle changes between brews when trying to duplicate or perfect that special recipe. This calculator provides a set tools to compute critical brew characteristics.
Key to understanding your brew is the measurement of Specific Gravity. Specific Gravity describes how much different than pure water your wort or brew is - in other words - how much of the Good Stuff is in your wort. Of particular interest is the amount of dissolved sugars. This will determine potential alcohol content of your beer. You should measure the specific gravity of your wort just after you brew - preferably when its cooled to near room temperature.
Specific Gravity is measured with an instrument known as a Hydrometer. It measures the density of wort relative to that of pure water - the higher the specific gravity ( > 1.000) the more dissolved solids are in your wort. Naturally, its not quite as simple as just measuring the specific gravity of the wort - you need to know the temperature as well. This is because the density of the wort varies with temperature. Hydrometers are calibrated to give accurate readings for liquids at 60 degrees F. Use this calculator to determine the actual specific gravity of your wort (known as Original Specific Gravity, or OG) at a particular temperature. While the corrected value may look only slightly different that the measured value, these small differences make a big difference in subsequent calculations.