Total and Free Sulfur Dioxide Calculator

The Total and Free Sulfur Calculator 🍷🧪 app helps you easily and accurately determine the amount of sulfur dioxide (SO₂) to add to wine or must, based on the volume and type of product used (metabisulfite or liquid solution).
It is designed for winemakers, winery technicians, and wine enthusiasts who want to manage sulfitation with precision and speed.

By entering the volume of wine, the desired concentration of free and total SO₂, and the current measured values, the calculator indicates how many grams of metabisulfite or solution to add to reach the target level.
You can choose from:

• Potassium metabisulfite (57% SO₂)
• 6% SO₂ solution
• 10% SO₂ solution

The app automatically calculates quantities in both total grams and mg/L equivalents, displaying the results in a clear and printable box.

💡 What it’s for:

• Adjust the amount of SO₂ before bottling
• Correct musts or wines with insufficient sulfur
• Prevent oxidation and microbial alterations
• Plan treatments in a controlled and informed manner

⚗️ How it works:
The calculation is based on the percentage content of pure SO₂ in the selected product.
By entering the current and desired values, the app determines the difference to be filled and converts this into the precise amount of additive to add.

⚠️ Important note:
The results are theoretical and should be validated with laboratory analysis. The actual amount of available SO₂ may vary depending on temperature, pH, and the state of the wine.
It is always recommended to carry out confirmation tests after addition.

In summary, the Total and Free Sulfur Calculator 🍇 is an indispensable tool for precise, safe, and professional management of sulfitation, helping you protect the wine and maintain its aromas and stability over time.