Free tools
Brewing calculators
The brewing math, on static pages that compute in your browser. No account, no sign-in, nothing sent anywhere. These run the same formulas Brewgravity uses inside a recipe.
ABV Calculator
Alcohol by volume from OG and FG, with attenuation, ABW and calories.
IBU Calculator
Tinseth bitterness for a hop addition, with form and whirlpool correction.
Beer Color Calculator (SRM & EBC)
SRM and EBC from your grain bill, by the Morey equation, with a color swatch.
Priming Sugar Calculator
Corn sugar, table sugar, DME or honey for a target carbonation level.
Strike Water Calculator
Strike temperature and water volume for a single infusion mash.
Brewhouse Efficiency Calculator
Your real efficiency from measured OG, batch volume and grain bill.
Refractometer Correction Calculator
Correct Brix readings for alcohol to get true gravity during fermentation.
Brix to Gravity Converter
Convert °Bx and °Plato to specific gravity and back.
Keg Carbonation Calculator
Regulator pressure for a target CO₂ level at your keg temperature.
Final Gravity Calculator
Predict where a beer will finish from OG and yeast attenuation.
Yeast Pitch Rate Calculator
Cells, liquid packs or dry yeast grams from OG, volume and beer type.
Hydrometer Temperature Correction
Correct a hydrometer reading for sample temperature.
Water Volume Calculator
Mash water, sparge water and total water from batch size and grain bill.
Force Carbonation Time Calculator
Estimated days to reach target CO₂ at your pressure and temperature.
Dilution Calculator
Water to add to hit a target gravity from a higher starting gravity.
Also free
Tools that are not calculators
Some questions do not have a formula behind them. These answer from the same ingredient database the recipe editor uses.
Hop flavor chart
Compare hop varieties side by side on nine aroma axes, filter by the character you are after, and find what is closest to one you cannot get. 172 varieties.
Ingredient reference charts
Alpha acid for 273 hops, color and yield for every fermentable, and attenuation for every yeast strain — published in full.
Or do it once, in the recipe
Calculators are useful for a single question. For a whole recipe, retyping the grain bill into six different pages gets old — Brewgravity recalculates gravity, bitterness, color, attenuation and volumes live as you edit, against the BJCP style targets, and keeps the result.