Wine Sulfite Calculator

Calculate precise sulfite additions for wine preservation

Wine Volume

Wine Type

Wine pH

Current Free SO2 (ppm)

Target Free SO2 (ppm)

Sulfite Form

Sulfite Addition

White (Dry)

SO2 to Add

50 ppm

1992 mg total

Potassium Metabisulfite Powder

1.99g

Molecular SO2

1.32 ppm

2.63% at pH 3.4

Wine Volume

6 gal

22.7 liters

Recommended Free SO2 Levels

White (Dry): 25-40 ppm

White (Sweet): 40-60 ppm

Red (Dry): 20-35 ppm

Red (Sweet): 35-50 ppm

Sulfite Tips

Higher pH wines need more free SO2 for the same protection
Molecular SO2 (the active form) decreases as pH increases
Test free SO2 with Ripper or AO method before each addition
Add sulfites after fermentation and at each racking
Legal limit is 350 ppm total SO2 in most countries