Free tools for winemakers
Free winemaking calculators
The same calculators we use in the cellar. No sign-in, no ads.
SO₂ addition calculator
Work out the sulfite to add to reach a free SO₂ target, typed or set from pH, or dose an amount over your volume.
Open SO₂ calculator →Yeast pitch calculator
Get a suggested dose from your sugar reading. Work out yeast, rehydration nutrient, water and potential alcohol.
Open yeast calculator →Yeast nutrient (YAN) calculator
Work out the DAP or complex nutrient to bring YAN up to a target, with a check against the legal DAP limits.
Open yeast nutrient calculator →Brix, SG and Baumé converter
Convert a sugar reading between Brix, SG, Baumé, Oechsle and KMW, with potential alcohol.
Open sugar converter →Additive dose calculator
Work out how much of any additive to add from its rate and your volume.
Open additive dose calculator →Chaptalization calculator
Work out the sugar to add to must to reach a higher sugar reading or potential alcohol.
Open chaptalization calculator →Blend to a target calculator
Mix two liquids to a target alcohol, sugar or acidity — fortification and the Pearson square.
Open blend calculator →Bench trial calculator
Turn the stock solution that worked in a sample into g/hL and an amount for the whole tank.
Open bench trial calculator →Wine blending calculator
Put 2 to 8 lots together and see the blend’s volume, alcohol, TA and residual sugar.
Open wine blending calculator →Grape yield calculator
Work out how much wine your grapes will make, and how many bottles and cases it fills.
Open grape yield calculator →Grape net weight calculator
Subtract the boxes, pallets and other tare from the scale reading to get the net weight of the grapes.
Open net weight calculator →Hydrometer temperature correction calculator
Correct a hydrometer reading taken warm or cold to its calibration temperature, in any sugar scale.
Open temperature correction calculator →Potassium sorbate calculator
Work out the potassium sorbate to add to a finished wine from its alcohol.
Open potassium sorbate calculator →ABV calculator
Work out the alcohol in a wine from the reading before fermentation and the final reading.
Open ABV calculator →Water addback calculator
Work out the water to add to must to bring its sugar or potential alcohol down to a target.
Open water addback calculator →Acid adjustment calculator
Raise titratable acidity with tartaric, malic, citric or lactic acid, or lower it with potassium bicarbonate or calcium carbonate.
Open acid adjustment calculator →Volume converter
Convert a volume between liters, hectoliters, milliliters and US gallons.
Open volume converter →Weight converter
Convert a weight between grams, kilograms and pounds.
Open weight converter →Temperature converter
Convert a temperature between Celsius and Fahrenheit.
Open temperature converter →Acidity converter
Convert titratable acidity between tartaric and sulfuric acid.
Open acidity converter →