The wine acidity calculator estimates how much acid to add to your must to reach your target pH. Enter current and target pH with must volume and acid type to get an approximate addition amount in grams.
Acid Addition Calculator
Note: pH adjustments vary by must composition and buffer capacity. Add half the calculated amount first, retest, then adjust further. Always use a calibrated pH meter for accurate readings.
Wine pH Reference
| Wine Type | Target pH Range | Notes |
|---|---|---|
| White Wine | 3.0 – 3.4 | Lower pH preserves freshness and crispness |
| Rosé Wine | 3.2 – 3.5 | Balanced between red and white wine ranges |
| Red Wine | 3.3 – 3.6 | Higher pH needed for color stability |
| Country/Fruit Wine | 3.0 – 3.5 | Varies significantly by fruit type |
How to Adjust Wine Acidity
Wine acidity affects flavor balance, microbial stability, and yeast health. The wine acidity calculator gives an estimated acid addition — always verify with a calibrated pH meter and add incrementally.
The Right Acid for Each Wine
Tartaric acid is the most stable and preferred for grape wines. Malic acid adds a sharper, green apple character and can be used alone or blended. Citric acid is the weakest option and is not preferred in grape wine as bacteria can convert it to diacetyl — but it works for country wines and cider.
Lowering pH vs. Raising It
Adding acid lowers pH. If pH is too low (below 3.0), you would add calcium carbonate to raise it. The most common adjustment needed is lowering pH in overly sweet or low-acid juice/must. For very high pH must (above 4.0), larger acid additions may be needed and the process should be done incrementally over 24-48 hours.
FAQ
Is this wine acidity calculator free?
Yes, completely free with no signup required.
What is the ideal wine pH?
Most table wines ferment best at pH 3.2-3.6. White wines: 3.0-3.4. Red wines: 3.3-3.6. Below 3.0 tastes very tart. Above 3.8 the wine is microbiologically unstable. Yeast ferments well at pH 3.0-3.5.
Which acid should I use — tartaric, malic, or citric?
Tartaric acid is preferred for grape wine — it's naturally present and stable. Malic acid is also natural in grapes and adds a crisp apple note. Citric acid should be used sparingly — it can ferment into diacetyl and off-flavors. For country wines (fruit, flower), blends are common.
How much does pH drop per gram of acid?
pH adjustment varies significantly by wine buffer capacity, existing titratable acidity, and acid type. This calculator uses average buffer capacities as a starting point. Always add acid incrementally and retest before adding more — exact adjustment depends on your specific must.
When should I test and adjust pH?
Test after crushing/pressing and before adding yeast. After primary fermentation completes, pH rises slightly (0.1-0.3 units) due to malolactic fermentation. Adjust before fermentation for yeast health. Final fine-tuning can occur after fermentation for balance.