Work out how many Campden tablets to use for your batch, whether you are sterilising fresh must, protecting wine between rackings, or dosing before bottling. Supports standard and high-strength tablets in litres or gallons.
Calculate how many Campden tablets to use for your volume and purpose.
Check your brand's packaging for weight per tablet
Campden tablets
3.2 tablets
Target SO₂
35 mg/L free SO₂
Track this in your batch log
MakeWine is a free winemaking app — log additions, lab readings and fermentations, and get a deterministic assistant. No card required.
For sterilising fresh must (~65 mg/L SO₂) you need roughly 1 standard tablet per gallon; for antioxidant or pre-bottling protection, a little less. Enter your volume and purpose for the exact count.
Yes — always crush and dissolve them in a little wine or water first, stir well, and (when sterilising must) wait ~24 hours before pitching yeast.
Calculations are estimates based on standard winemaking formulas (Henderson–Hasselbalch for SO₂, Duncan & Acton for wine ABV, standard addition rates). Always verify critical additions with a reference or lab analysis. The decision and responsibility for any addition rest with you.