Calculadora de ABV de Cerveza — Fórmula
## How to Calculate Beer ABV
### Formula
**ABV = (OG - FG) x 131.25**
This is the standard homebrewing formula. OG (original gravity) is measured before fermentation, and FG (final gravity) is measured after fermentation is complete.
### Apparent Attenuation
**AA = (OG - FG) / (OG - 1) x 100%**
Attenuation measures what percentage of the available sugars were fermented. Most beer yeasts achieve 65-80% apparent attenuation.
### Taking Gravity Readings
Use a hydrometer or refractometer. Hydrometers are calibrated to 60°F; adjust for temperature differences. Refractometer readings after fermentation need a correction factor because alcohol changes the refraction.
### Formula
**ABV = (OG - FG) x 131.25**
This is the standard homebrewing formula. OG (original gravity) is measured before fermentation, and FG (final gravity) is measured after fermentation is complete.
### Apparent Attenuation
**AA = (OG - FG) / (OG - 1) x 100%**
Attenuation measures what percentage of the available sugars were fermented. Most beer yeasts achieve 65-80% apparent attenuation.
### Taking Gravity Readings
Use a hydrometer or refractometer. Hydrometers are calibrated to 60°F; adjust for temperature differences. Refractometer readings after fermentation need a correction factor because alcohol changes the refraction.
Ejemplo Resuelto
A pale ale with OG 1.050 and FG 1.010.
- ABV = (1.050 - 1.010) x 131.25 = 5.25%
- Attenuation = (1.050 - 1.010) / (1.050 - 1) x 100 = 80%
- This is a well-attenuated beer at a standard strength.