1.05
SG
1.011
SG
5.1
%
13.1
°Bx
0
points
2.6
oz
0.73
vol CO2
11
FG points
1.05
SG
1.011
SG
5.1
%
13.1
°Bx
0
points
2.6
oz
0.73
vol CO2
11
FG points
Hard cider is one of the most accessible fermented beverages to make at home — apple juice, yeast, and patience are all you need to produce a delicious beverage. The Cider Calculator estimates original gravity, final gravity, alcohol by volume, and priming sugar requirements for carbonation, helping you design and predict your cider batch from start to finish.
Apple juice naturally contains approximately 10-14% sugar, corresponding to a starting specific gravity (SG) of 1.040-1.065 and a Brix of 10-16°. Fermented to dryness, this produces a cider of approximately 5-8% ABV — comparable to many commercial craft ciders. The specific apple varieties, blending practices, and processing methods dramatically affect the juice's sugar content, acidity, and tannin levels, all of which influence the final cider character.
The choice of yeast profoundly shapes cider style. Ale yeasts ferment quickly and produce fruity esters that complement apple flavors, though they tend to strip some delicate varietal aromatics. Wine and champagne yeasts (EC-1118, K1-V1116) ferment more completely and cleanly, producing dry ciders with higher ABV but less fruit-forward character. Cider-specific yeasts (Mangrove Jack's M02, White Labs WLP775) are bred to balance fermentation completeness with apple aroma retention. Wild or traditional keeving fermentation (using naturally occurring wild yeasts and pectin-based sugar removal to stall fermentation) produces the semi-sweet, low-alcohol traditional French and English farmhouse ciders at 3-4% ABV.
Adding supplemental sugar (white sugar, honey, brown sugar, or maple syrup) before fermentation increases the OG and final ABV — a technique called chaptalization in winemaking, though informally used in cider production as well. Brown sugar adds subtle molasses notes; honey produces a cider-mead hybrid called a cyser; maple syrup adds a distinctive earthy sweetness. Each addition raises gravity and ABV proportionally.
Carbonation transforms cider from a flat country wine into a refreshing, effervescent beverage. Bottle conditioning — adding a small amount of priming sugar to the cider before bottling to allow residual yeast to produce CO2 in-bottle — is the simplest method. Target volumes of CO2: 1.5-2.0 for lightly sparkling; 2.5-3.5 for champagne-style. This calculator accounts for your fermentation temperature, which determines how much CO2 is already dissolved in the cider at packaging time.
The OG is calculated from the juice's measured starting gravity plus any additional sugar (added sugar lbs × 46 PPG / gallons). FG is estimated by applying the selected yeast's attenuation percentage to the OG gravity points. ABV is derived from OG-FG using the standard formula × 131.25. Priming sugar is calculated from the difference between the target carbonation volumes and the CO2 already dissolved at fermentation temperature, then converted to ounces of sugar per 5-gallon batch.
A cider OG above 1.065 will produce a strong cider (7%+ ABV) — enjoyable but more wine-like than traditional cider. Standard ciders at OG 1.045-1.060 produce familiar 5-7% ABV beverages. If your starting gravity is too low, adding 0.5-1 lb of sugar per gallon raises OG and ABV meaningfully. For carbonation, use corn sugar (dextrose) as your priming sugar — it ferments cleanly without adding any flavor. Dissolve in a small amount of boiling water, cool, and mix gently into the cider before bottling.
Inputs
Results
A clean, dry English-style cider at 5.4% ABV with light carbonation. Use 3.2 oz of corn sugar for bottle conditioning.
Inputs
Results
Adding 1.5 lbs of honey (cyser-style) boosts ABV to 6.9%. Champagne carbonation requires 8.5 oz of priming sugar for lively effervescence.
Use preservative-free juice — avoid anything containing potassium sorbate, sodium benzoate, or sodium metabisulfite, as these inhibit or kill yeast. Fresh-pressed juice from an orchard is ideal. Commercial pasteurized juice (no preservatives) works well. Tree Top, Martinelli's, and Whole Foods organic juices are commonly used by homebrewers.
Yes, adding pectic enzyme (pectinase) before fermentation dramatically improves clarity. Apple juice is rich in pectin, which forms a persistent haze. Add pectic enzyme at a rate of 1 tsp per 5 gallons at the start of fermentation (or 12 hours before pitching yeast). It will produce a noticeably clearer cider after fining or cold crashing.
Keeving is a traditional French technique that uses naturally occurring enzymes (pectinase) and calcium chloride to form a thick gel cap (chapeau brun) that rises to the top of the must, carrying nutrients with it and naturally starving the wild yeast — resulting in a slow, incomplete fermentation that produces a semi-sweet, low-alcohol (3-4% ABV) traditionally naturally carbonated cider. It is labor-intensive and weather-dependent, practiced mainly with specific high-pectin apple varieties.
Yes. Cider production uses essentially the same equipment as homebrewing: fermentation vessels, airlocks, racking canes, auto-siphons, bottle capper/corker, and sanitizer. The main difference is that cider requires no mashing or boiling — the juice goes directly to the fermenter after adjusting gravity and adding yeast.
Most ciders finish primary fermentation in 1-3 weeks at room temperature. After active fermentation slows (airlock bubbling reduces to one bubble per minute), wait an additional 1-2 weeks for the cider to clarify and off-flavors to integrate. Cold crashing at 35-40°F for 48-72 hours before packaging significantly improves clarity.
Vinegar (acetic acid) flavor indicates acetic acid bacteria (Acetobacter) contamination, which converts alcohol to vinegar in the presence of oxygen. Causes: airlock running dry during fermentation, improper sanitization, oxidation during racking. Prevention: always maintain an airlock with sanitizer, minimize splashing during transfer, keep equipment scrupulously sanitized.
Backsweetening adds sweetness to a fully fermented dry cider. Stabilize first: add 0.5 tsp potassium sorbate + 1 Campden tablet per gallon, wait 24 hours, then add juice concentrate, apple juice, or honey to taste. Without stabilization, the yeast will referment the added sugar and potentially overcarbonate or burst bottles.
Dry cider has fermented most or all of its sugars (FG 1.000-1.005), resulting in a tart, wine-like beverage. Sweet cider retains more residual sugar (FG 1.010-1.020+), achieved by stopping fermentation early (cold crashing + stabilizing), using a low-tolerance yeast, or backsweetening after fermentation. Most commercial ciders are sweetened after fermentation.
Yes. Wild fermentation using naturally occurring yeast on the apple skins can produce complex, funky, terroir-driven ciders. However, it is unpredictable — sometimes resulting in beautiful complexity, sometimes in off-flavors. Add no sulfite if fermenting wild (sulfite kills wild yeast). Traditional farmhouse cidermakers rely exclusively on wild yeast, often specific to their orchard's native flora.
After fermentation is complete, move the fermenter to a refrigerator (35-40°F) for 48-72 hours. The cold causes yeast, pectin, and protein particles to drop out of suspension and settle to the bottom. Rack the clarified cider off the sediment before packaging. Combine with pectic enzyme additions earlier in fermentation for best results.
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