Enter the original gravity and final gravity into the calculator to determine the Alcohol by Volume (ABV). This calculator can also evaluate any of the variables given the others are known.

## Alcohol Per Volume Formula

The following formula is used to calculate the Alcohol by Volume (ABV).

ABV = (OG - FG) * 131.25

Variables:

- ABV is the Alcohol by Volume (%)
- OG is the original gravity (specific gravity before fermentation)
- FG is the final gravity (specific gravity after fermentation)

To calculate the Alcohol by Volume, subtract the final gravity from the original gravity. Then, multiply the result by 131.25. The result is the Alcohol by Volume expressed as a percentage.

## What is Alcohol Per Volume?

Alcohol Per Volume (ABV) is a standard measure used worldwide to quantify the amount of alcohol (ethanol) contained in an alcoholic beverage. It is expressed as a percentage that represents the volume of pure ethanol as a proportion of the total volume of the beverage. For example, a beverage with an ABV of 5% means that 5% of the total volume of the beverage is pure alcohol. This measure helps consumers understand the strength of the alcoholic beverage.

## How to Calculate Alcohol Per Volume?

The following steps outline how to calculate the Alcohol Per Volume (ABV) using the formula: ABV = (OG – FG) * 131.25

- First, determine the original gravity (OG) and the final gravity (FG) of the alcohol.
- Next, subtract the final gravity (FG) from the original gravity (OG).
- Multiply the difference by 131.25.
- Finally, calculate the Alcohol Per Volume (ABV).
- After inserting the values and calculating the result, check your answer with the calculator above.

**Example Problem:**

Use the following variables as an example problem to test your knowledge:

Original gravity (OG) = 1.050

Final gravity (FG) = 1.010