Gravity Calculator

Gravity & ABV Calculator

Extract, dilution, and ABV calculator for brewers

1. ABV & Attenuation Calculator

Unit:

Original Gravity (OG)

e.g., 1.050

Final Gravity (FG)

e.g., 1.010

ABV (Standard):
5.25 %

ABV (Advanced):
5.38 %

Apparent Attenuation (AA):
80.0 %

Real Attenuation (RA):
65.2 %

2. Dilution & Concentration Calculator

Unit:

Calculates final volume and gravity when diluting with water or concentrating by boiling.

Current Volume (L)

Current Gravity (SG1)

Added Water (L)

*Enter negative value to calculate boil-off

Estimated New Gravity (SG2)

1.050

Total Volume (L)

120 L

3. Hydrometer Temp Correction

Unit:

Measured Gravity (SG)

Sample Temp (°C)

Calibration Temp (°C)

Corrected Gravity

1.060

Plato Equivalent (°P)

14.7 °P

4. Refractometer Alcohol Correction

Alcohol affects Brix readings during and after fermentation. This adjusts the final gravity and ABV based on the original and current Brix.

OG (Brix)

Measured FG (Brix)

Wort Correction Factor (WCF)

Corrected True FG:
1.011

Corrected Extract (°P):
2.8 °P

Calculated ABV:
5.18 %