Inputs
TA changes should be tested on a bench sample before adjusting the full batch.
Winemaking
Wine Acid Adjustment Calculator
Estimate common acidification or deacidification additions from current TA, target TA, and batch volume.
Plan acid changes before bench trials
This calculator translates a target TA change into a small-scale addition estimate. It is useful before bench trials, especially when you want to compare the scale of an acid addition against a deacidification option.
- TA is reported as tartaric acid equivalent.
- Tartaric acid additions are treated as a direct g/L TA increase.
- Carbonate deacidification estimates use chemical equivalents and should be confirmed with a lab retest.
Acid adjustment notes
Acidity changes affect more than a number on a lab sheet. They can change flavour, stability, colour, microbial risk, and the timing of cold stabilization.
Use the calculator to size a bench trial first. If the trial tastes worse even though the TA looks better, the arithmetic has done its job by preventing a full-batch mistake.
Why bench trials matter
A wine can have the same TA after two different treatments and still taste different. Tartaric acid, potassium bicarbonate, calcium carbonate, potassium bitartrate precipitation, pH movement, and cold stability can all change the practical result.
For production work, make small labelled samples, let them settle where appropriate, and retest before scaling the addition.
Before using the result on a full batch
Use this as planning arithmetic. Measure carefully, write down the assumptions, and make the smallest practical trial before a full cellar adjustment.
Best use
Sizing tartaric acid, potassium bicarbonate, or calcium carbonate additions for a trial sample.
Do not skip
pH, taste, cold stability, legal limits, and a post-treatment TA check.
If the number looks surprisingly large or small, recheck every unit before acting. Most cellar mistakes start as unit mistakes.
How It Works
This calculator estimates common wine acidification or deacidification additions from TA change and volume.
- Enter batch volume plus current and target TA.
- Choose whether you are raising TA with tartaric acid or lowering TA with a carbonate.
- Review total grams, grams per litre, and the bench-trial warning.
FAQ
Is this the same as pH adjustment?
No. TA and pH are related but not interchangeable. A treatment can move one more than the other.
Can I add the calculated amount directly to the full batch?
Bench trials are strongly recommended before any full-batch addition.
Why are carbonate additions not 1:1?
Potassium bicarbonate and calcium carbonate are converted using acid-neutralizing equivalents, not direct flavour equivalence.