Conversions
Brix Tool
Convert between Brix and Specific Gravity. Brix and Specific Gravity are different units for calculating the potential alcohol strength in a solution.
Plato Tool
Convert between Plato and Specific Gravity. These are brewing estimates, not lab measurements.
Gravity Points
Convert between gravity points and Specific Gravity. These are brewing estimates, not lab measurements.
Recipe
Predicted OG
Estimate original gravity from your fermentables, brewhouse efficiency, and batch size. Enter each fermentable's potential as PPG or as extract %. Late boil additions count at 100% efficiency.
Predicted FG
Estimate final gravity from original gravity and your yeast's apparent attenuation. These are brewing estimates, not lab measurements.
Hop Bitterness
Estimate IBU with Tinseth from each hop addition, pre-boil gravity, and post-boil volume. Whirlpool additions scale with temperature, and dry hops add no IBU. These are brewing estimates, not lab measurements.
Beer Color
Estimate beer color from each grain's weight and color in °Lovibond (Morey). These are brewing estimates, not lab measurements.
Water
Water Chemistry
Adjust your source water with RO dilution, brewing salts, and lactic acid, then estimate residual alkalinity (Kolbach) and mash pH (Troester). Enter ions in ppm and alkalinity as CaCO₃. These are brewing estimates, not lab measurements.
Salts: Gypsum CaSO4·2H2O, Calcium chloride CaCl2·2H2O, Epsom salt MgSO4·7H2O, Baking soda NaHCO3, Chalk CaCO3.
Brew Day & Fermentation
How many cells your batch needs, and how big a starter to make with light DME.
Plan a yeast starter →Strike Temperature
Water temperature to hit a mash target, from grain temperature and the water-to-grain ratio (Palmer). Doesn't account for tun heat loss.
Brew-day Volumes
Work back from the cold volume you want in the fermenter to the pre-boil volume and total water needed. Leaves out trub, dead space, and other equipment losses.
Hydrometer
Correct a hydrometer reading for sample temperature. Calibration defaults to 60 °F. These are brewing estimates, not lab measurements.
Fermentation
Estimate ABV and apparent attenuation from original and final gravity. These are brewing estimates, not lab measurements.