Guide
Wine Acidity Explained
Understand the difference between pH and titratable acidity and why bench trials matter.
Wine Making
SO₂ Calculator
Estimate a potassium metabisulfite (K-meta) addition from measured free SO₂ and a chosen target. The result is a starting point, not a safety or microbial-stability guarantee.
Enter your measurements
Estimate potassium metabisulfite needed for a free-SO₂ target adjustment.
Good to know
Frequently asked questions
Is the same free-SO₂ target right at every pH?
No. Molecular SO₂ depends strongly on pH. Use a reputable winemaking reference and measured pH to choose a target.
Will all added SO₂ remain free?
No. Some binds or is lost. Re-test free SO₂ after the addition and follow the product label.
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Estimate a potassium metabisulfite mass for a chosen free-SO₂ increase.
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