ABV Calculator

Calculate alcohol by volume from original and final gravity readings.

Gravity Readings

Enter your hydrometer or refractometer readings

Gravity Unit

Original Gravity (SG)

Reading before fermentation

Final Gravity (SG)

Reading after fermentation

Alcohol Content

Calculated ABV using standard formula

5.25%

ABV

Apparent Attenuation

80.0%

Real Attenuation

64.4%

Estimated Calories (per 12oz / 355ml)

140 cal

103 from alcohol, 37 from carbs

SG (Specific Gravity) is measured with a hydrometer. Brix and Plato are typically measured with a refractometer.

Note: Refractometer readings after fermentation need correction due to alcohol presence. For best accuracy, use a hydrometer for final gravity.