DemijohnCalculators for wine, mead and cider
The same formulas as the Demijohn app, with the source under every result. They run in your browser: nothing you type is sent or saved.
- ABV from OG and FGStandard and alternate formula, temperature correction, step feeds.
- How much sugar or honeyFor a target gravity or potential alcohol, with the new volume.
- Hydrometer temperatureCorrect a reading taken warm or cold, 60 °F or 20 °C hydrometers.
- Gravity scales and tableSG, Brix, Plato, Oechsle, Babo, Baumé, with potential alcohol.
- Mead for beginnersHoney for your batch, nutrients in steps, finishing and bottling.
Which one first
- Read the hydrometer at the right temperature. If the sample is warmer or colder than your hydrometer’s calibration, correct it with the temperature calculator.
- Set the start. The sugar and honey calculator gives the amount for a target gravity or potential alcohol.
- Measure the end. The ABV calculator works from your OG and your latest reading, including sugar or honey you added on the way.
- Another scale on the label or in a book? The converter and table covers SG, Brix, Plato, Oechsle, Babo and Baumé.
Doses are estimates. Add in steps, test again, follow the product label. For personal use only.