SuperCalX

Beer ABV Calculator

Calculate Alcohol by Volume (ABV) from specific gravity readings.
Calculator
Enter your values
Results
Alcohol by Volume
5.25%
Apparent Attenuation
80.0%
Est. Calories (12oz)
~697 kcal
Analysis
Interpretation of the current calculator output

Calculation Summary

The current inputs have been processed for the beer abv calculator. Review the results panel for the computed output and use the charts tab to compare the current values visually.

How to Read It

The main result shows the direct answer for your current inputs. Supporting sections below explain the method, example, and common questions so the result is easier to interpret.

How to Use

Step-by-step instructions
  1. 1Measure Original Gravity (OG) before fermentation.
  2. 2Measure Final Gravity (FG) after fermentation.
  3. 3Enter both values.
  4. 4The calculator shows ABV and attenuation.

Standard Formula

Calculates alcohol percentage based on the change in density (gravity) caused by fermentation.
ABV = (OG - FG) × 131.25

Variables:

OGOriginal Gravity
FGFinal Gravity

Example

Pale Ale

Inputs:

OG:1.050
FG:1.010

Steps:

  1. 1.(1.050 - 1.010) × 131.25
  2. 2.0.040 × 131.25 = 5.25%
Result:
5.25% ABV

Frequently Asked Questions

What is attenuation?

Attenuation is the percentage of sugars that yeast has consumed and converted to alcohol. Most yeast strains attenuate between 65-80%.