Guide
Understanding Specific Gravity
A practical introduction to gravity readings, hydrometers, temperature correction, and fermentation progress.
Wine Making
Wine Sugar Calculator
Estimate the grams of fermentable sucrose needed to raise a measured must gravity. Dissolve additions, mix thoroughly, and re-measure before adding more.
Enter your measurements
Estimate a sugar addition to raise wine must to a target specific gravity.
Good to know
Frequently asked questions
Should all the sugar be added at once?
Not always. Staggered additions can be appropriate, but follow a tested recipe and yeast guidance and re-measure after mixing.
Does the calculator account for fruit sugar?
Use the measured current gravity, which includes dissolved extract. The estimate does not identify individual sugar sources.
Keep exploring
Related guides & calculators
Guide
How Much Sugar to Add to Wine
Estimate a sugar adjustment from measured gravity, then make small additions and verify the result.
Calculator
Wine Acidity Calculator
Estimate a tartaric-acid addition to move measured titratable acidity toward a target.
Calculator
SO₂ Calculator
Estimate potassium metabisulfite needed for a free-SO₂ target adjustment.
Calculator
Potassium Metabisulfite Calculator
Estimate a potassium metabisulfite mass for a chosen free-SO₂ increase.
Calculator
Wine Batch Size Calculator
Estimate the finished wine volume needed to fill a chosen number of bottles.