Sulfite Addition Calculator

How It Works

This calculator estimates sulfite additions to increase free SO2 to a chosen target.

1. Enter wine volume plus current and target free SO2 levels.
2. Set KMS SO2 strength and tablet weight assumptions.
3. Review SO2-equivalent requirement, grams KMS, and tablet estimate.

FAQ

Does free SO2 stay constant after addition?

Not always. Binding reactions can reduce free SO2 after dosing.

Is free SO2 the same as total SO2?

No. Free SO2 is the active protective fraction; total includes bound forms.

Should I verify analytically after dosing?

Yes. Re-testing is recommended to confirm actual achieved free SO2.