SO2 / Sulfite Calculator
Work across molecular targets, K-meta additions, liquid SO2 solution planning, and excess-SO2 blend-down from one parent tool.
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Target Free SO2
35.7 ppm
0.80 ppm molecular target at pH 3.45
Current Molecular SO2
0.45 ppm
Computed from current free SO2 and wine pH
K-meta Requirement
104.4 g
27.6 mg/L K-meta
Liquid SO2 Option
991.9 mL
6.0% solution
Target free SO2 is 35.7 ppm at pH 3.45. Raise free SO2 by 15.7 ppm with 104.4 g K-meta or 991.9 mL of 6.0% solution.
Current molecular SO2
0.45 ppm
From current free SO2 and pH
Target free SO2
35.7 ppm
Needed to support 0.80 ppm molecular SO2
Required lift
15.7 ppm
Additional free SO2 required
pH risk
Lower
Higher pH requires materially more free SO2 for the same molecular target
| pH | Free SO2 for 0.5 ppm | Free SO2 for 0.8 ppm | Free SO2 for 1.0 ppm |
|---|---|---|---|
| 2.80 | 5.4 ppm | 8.6 ppm | 10.8 ppm |
| 2.90 | 6.7 ppm | 10.6 ppm | 13.3 ppm |
| 3.00 | 8.2 ppm | 13.2 ppm | 16.5 ppm |
| 3.10 | 10.2 ppm | 16.4 ppm | 20.5 ppm |
| 3.20 | 12.8 ppm | 20.4 ppm | 25.5 ppm |
| 3.30 | 16.0 ppm | 25.5 ppm | 31.9 ppm |
| 3.40 | 20.0 ppm | 31.9 ppm | 39.9 ppm |
| 3.50 | 25.0 ppm | 40.0 ppm | 50.0 ppm |
| 3.60 | 31.3 ppm | 50.1 ppm | 62.7 ppm |
| 3.70 | 39.3 ppm | 62.9 ppm | 78.6 ppm |
| 3.80 | 49.4 ppm | 79.0 ppm | 98.7 ppm |
| 3.90 | 62.0 ppm | 99.2 ppm | 124.0 ppm |
| 4.00 | 77.9 ppm | 124.7 ppm | 155.9 ppm |
| 4.10 | 98.0 ppm | 156.8 ppm | 196.0 ppm |
| 4.20 | 123.2 ppm | 197.2 ppm | 246.5 ppm |