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ABV Calculator

Easily Calculate The Alcohol Content of Your Homebrews

Easily calculate the alcohol content of your beer, wine, mead, cider, or any other fermented creation with our specific gravity and plato calculator.

Finds ABV based on gravity change. If you took an original gravity reading (or had estimated OG), and also took a final gravity (FG) reading prior to adding priming sugar at bottling you can find out your batch’s alcohol by volume ABV.

ABV Calculator

ABV Calculator


Gravity Unit:
Original Gravity (OG):
Final Gravity (FG):
Equation:

(see below for more information)
Alcohol By Volume:
6.56
%
Apparent Attenuation:
100.00
%
Original Gravity:
12.39
°p
Final Gravity:
0.00
°p

Our ABV calculator allows you to pick between the alternate equation and the standard equation. Use the standard equation if you don’t know the difference and aren’t sure which to use.

FAQs copy

How do I calculate alcohol by volume (ABV)?

To calculate alcohol by volume (ABV), you can use the formula provided on the Fermentaholics website: ABV = (Original Gravity – Final Gravity) * 131.25.

What is the meaning of "Original Gravity" in ABV calculations?

“Original Gravity” refers to the specific gravity of your beverage before fermentation begins. It measures the density of the liquid, typically using a hydrometer, and serves as a baseline for ABV calculations.

What does "Final Gravity" represent in ABV calculations?

“Final Gravity” represents the specific gravity of your beverage after fermentation has completed. This measurement indicates the remaining sugars and other dissolved substances in the liquid, allowing you to determine the alcohol content.

How do I measure the Original Gravity and Final Gravity of my beverage?

You can measure the Original Gravity and Final Gravity using a hydrometer, which is a device used to measure the specific gravity of liquids. Simply take a sample of your beverage and place the hydrometer in it, allowing it to float. The reading on the hydrometer scale will indicate the specific gravity.

Can the ABV calculation be affected by temperature?

Yes, temperature can impact the accuracy of ABV calculations. It is crucial to adjust your hydrometer readings to the correct temperature, as specified by the instrument’s instructions, to obtain accurate results.

Can the ABV calculator be used for any type of beverage?

Yes, the ABV calculator can be used for various types of beverages, including beer, wine, cider, mead, and other fermented drinks. It provides a general estimation of the alcohol content based on the specific gravity measurements.

Is the ABV calculation accurate for all types of fermentation?

The ABV calculation provides a reasonably accurate estimation for most standard fermentation processes. However, certain factors such as the presence of non-fermentable sugars or additives in the beverage may affect the accuracy of the calculation.

Is it necessary to adjust the ABV calculation for different types of yeast?

No, the ABV calculation does not require adjustment based on the type of yeast used. The formula considers the difference between the Original Gravity and Final Gravity measurements, which are influenced by the fermentation process as a whole, rather than specific yeast strains.

Can the ABV calculator account for additional flavors or ingredients in the beverage?

The ABV calculator does not directly account for additional flavors or ingredients in the beverage. It focuses primarily on determining the alcohol content based on specific gravity measurements. To calculate the impact of additional flavors or ingredients, a more comprehensive analysis may be necessary.

Can I use the ABV calculator for non-alcoholic beverages?

The ABV calculator is specifically designed for calculating the alcohol content in fermented beverages. Therefore, it is not suitable for non-alcoholic beverages that do not undergo fermentation.

Does the ABV calculation account for carbonation in beverages?

The ABV calculation does not directly account for carbonation in beverages. It focuses solely on estimating the alcohol content based on the specific gravity measurements. Carbonation levels are typically measured separately and do not affect the ABV calculation.

Is the ABV calculation affected by the size of the fermentation vessel?

The size of the fermentation vessel does not impact the ABV calculation. The calculation is based on the specific gravity measurements, which are influenced by the concentration of fermentable sugars and the amount of alcohol produced during fermentation, rather than the vessel size.

Can the ABV calculation be performed without a hydrometer?

The ABV calculation relies on specific gravity measurements, which are typically obtained using a hydrometer. While alternative methods such as refractometers exist, a hydrometer is commonly used for accurate ABV calculations. It is recommended to use a hydrometer for precise results.

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