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SO₂ / Campden Calculator

Calculate the correct dose of sulphite (Campden tablets or potassium metabisulphite) to protect your wine from oxidation and spoilage bacteria.

Volume (litres)

Wine pH (optional)

Target Free SO₂ (mg/L)

Current Free SO₂ (mg/L)

0 if unknown or new must

Campden Tablets

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K-Meta (g)

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Na-Meta (g)

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💡 For a new must, 1 Campden tablet per 4.5 litres is the standard starting dose. Always crush tablets and dissolve in a small amount of must before adding. Wait 24 hours before adding yeast.