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Homebrew Calculators

Free, no nonsense calculators for home brewers, whatever you make: beer, wine, mead or cider. No sign up, no download, just the numbers you need.

ABV Calculator
Turn your original and final gravity into alcohol by volume and apparent attenuation.
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Mead Honey Calculator
How much honey your mead needs for a target strength and sweetness, in kg and jars.
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Wine Sugar Calculator
How much sugar to add to your must to hit a target ABV, from a hydrometer reading.
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Fortification Calculator
How much spirit to add to fortify your wine or mead to a target strength, or the ABV after a measure.
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Backsweetening Calculator
How much sugar or honey to sweeten a finished dry wine, mead or cider to your target gravity.
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Stabilising Calculator
Campden tablet and potassium sorbate doses by batch volume, before backsweetening or bottling.
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Mead Nutrient Calculator
A Fermaid O dose and staggered TOSNA schedule from your batch size and target ABV.
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Brix to Gravity Calculator
Convert a refractometer Brix reading to specific gravity and potential alcohol, or back again.
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Priming Sugar Calculator
How much sugar to add at bottling to carbonate your beer or cider to the right level.
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Hydrometer Temperature Correction
Adjust a gravity reading taken warm or cold to the true specific gravity.
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Refractometer Correction
Turn Brix readings into corrected gravity and ABV, accounting for alcohol.
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Recipe & Batch Scaler
Scale any recipe up or down to a new batch size, ingredient by ingredient.
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Printable Brew Log Sheet
A free one page log for any batch: readings, rackings and notes. Print or save as PDF.
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More than a calculator

Demijohn Journal works out ABV automatically as you log readings, and keeps your recipes and fermentation history in one place. Free.

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