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Alcohol by volume (ABV) is calculated from starting and finishing gravity readings. The gravity drop indicates how much sugar was converted to alcohol by fermentation.

Формула

ABV ≈ (OG - FG) × 131.25, where OG/FG are original/final gravity

Водич корак по корак

1Measure original gravity (OG) before fermentation
2Measure final gravity (FG) after fermentation
3Apply formula to estimate ABV percentage

Worked Examples

Инпут

OG = 1.060, FG = 1.010

Резултат

ABV ≈ 6.5%

(0.050) × 131.25

Common Mistakes to Avoid

✕Using Plato instead of specific gravity
✕Not controlling fermentation temperature

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