Calculate The Alcohol Content Of Your Beer!

With this ABV calculator, you can get Alochol By Volume reports of your brewing based on gravity changes. Know the initial and final gravity readings of Specific Gravity or Plato units.


Alcohol by Volume: 1

Alcohol Attenuation: 1

CalculatorABV.com helps you understand and measure the percentage of alcohol in your homebrew beer. The calculator is extremely simple to use and is extremely accurate in its readings. All we need is your initial and final gravity readings. These can be either in SG or in Plato units, to be able to determine the alcohol percentage in your beer.


What is Alcohol By Volume (ABV)?


Alcohol By Volume, most commonly known by its abbreviation ABV, is a standard unit of measurement that is used to calculate the percentage of alcohol (ethanol) in an alcoholic beverage. In principle, ABV is the number of milliliters of pure, unadulterated ethanol that can be found in 100 milliliters of a solution, at 20°C or at 68°F. ABV is considered the gold standard for measuring the percentage of alcohol in a beverage. Very simply put, if your beer has 5% ABV, that means it has 5 milliliters of alcohol for every 100 milliliters of beer. The potency of an alcoholic beverage is determined by the ABV percentage of the drink.


How do you calculate ABV from Specific Gravity (SG)?


The standard method of calculating the ABV levels of a drink is by gauging its specific gravity. Specific Gravity is the relative density of a liquid when compared with the density of water. When your home brewed beer starts its fermentation process, the specific gravity of the liquid also changes. There are quite a few ways you can calculate ABV from specific gravity.


One of the simplest and the most effective ways to calculate ABV is to take a reading when you are brewing your beer. This would be your OG (Original Gravity). The reading taken at the end, when the fermentation process is complete would be the Final Gravity (FG).


Once you have these readings, you apply a simple formula to calculate the ABV in your drink.


– First you subtract the Original Gravity from your Final Gravity reading.


– Multiply the number you get into 131.25.


– The answer is your ABV Percentage


Formula for calculating ABV (FG – OG) X 131.25 = ABV%


If the math is just too much of a hassle for you. The simpler alternative is to use our ABVCalculator to calculate the ABV% of your delicious homebrew beer!

What is the difference between ABV, ABW and Proof?


Proof testing to measure the potency of an alcoholic beverage dates all the way back to the 16th Century. Originating in England, the proof method involved soaking a pellet of gunpowder in a spirit to test the flammability of the alcohol. If the alcohol retained its flammability after the ‘gunpowder experiment’, it would be considered to be above proof. Then, it would be levied a higher tax owing to its stronger alcohol percentage.


1816 saw the introduction of a new method to test the alcohol levels in a beverage. The method that would replace the Proof test. This method relies on the specific gravity test to determine the ABV% of a spirit. Since the introduction of this method, the preferred unit of measurement for the alcohol content has been ABV (Alcohol By Volume) or ABW (Alcohol By Weight).


This does mean that you cannot determine Proof level of alcohol anymore. You can find the proof equivalent of a spirit if you know it’s ABV. The method of deriving the proof level is distinctly different in the US, if you compare it with how it’s derived in the UK.


In the US, ‘proof’ is twice the ABV level of a beverage. So if the ABV% is 30, that alcohol would be considered to have 60 proof.


In the UK, things are measured a little differently, and the calculation is a little more complex, as compared with their American counterparts. In the UK, the difference is 1.7 times between the proof of an alcohol and its ABV. So 100 Proof in the UK would mean 57% ABV.


The logic behind the way Proof is calculated in the UK? Well, a quantity of a beverage that has 100 degrees proof liquor, would hold the same weight as 12/13 of the same volume of pure water, at a temperature at 51°F or 10.5°C. Hence, 100 Proof is considered to have 57.51% ABV.

How to use our ABV calculator?


Here’s what you need to do to measure the alcohol volume in your homebrew beer.


– The first step is to calibrate your Hydrometer. This will help in ensuring the accuracy of your readings. The best way to ascertain if your hydrometer is working properly is to test it with clear water. If you get a reading of 1, you are good to go. If not, you are going to have to adjust all your future readings accordingly.


– The first reading should be taken before the fermentation process begins in your homebrew. This would be your original specific gravity. Let’s consider a hypothetical value of 1.055.


– The next reading should be taken when the fermentation process in your beer has completed, and is ready for consumption. This would be your final specific gravity. Let’s assume this value is 1.023.


– The next step is the simplest. Enter the readings marked from your hydrometer on our beer calculator and we’ll do the rest. Make sure the unit of measurement is set at SG (Specific Gravity). Enter the original Specific Gravity in the first column. In this case, 1.055 and the Final Specific Gravity in the following column, in this case, the value is 1.023.


– Click on the ‘Calculate’ button, once you have entered accurate values. You will find the volume of alcohol in your beer through our ABV calculator. In this case, the ABV% in your beer is 4.16%. Now wasn’t that easy?

What is Alcohol?


Simply put, Alcohol is a chemical compound. Scientifically known as Ethanol or Ethyl Alcohol. Essentially, it is a chemical compound that can be found in various liquids. Alcohol is commonly found in spirits and beverages like Beer, Vodka, Wine, Whiskey, Gin and Liqueurs. Alcohol is formed when the yeast ferments the sugar in different food items, causing a breakdown due to the lack of oxygen. For example, Beer gets its alcoholic volume from the fermentation of the sugar present in the malted barley. Various alcoholic beverages follow a similar process, just with different food items. The sugar in grapes undergo a fermentation process that ranges from a few weeks to even years and decades, to make world class Wine. Potatoes and Vodka is another example of the fermentation process that is imperative to give a spirit its alcohol content.


Alcohol has a lot of effects on the human body and brain which can vary. In moderate amounts, alcohol can be a stimulant and help cause a feeling of euphoria and excitement. It can also be extremely calming. An overdose of alcohol, however, can cause drowsiness, alcohol poisoning and in some cases can be fatal. Regular consumption of alcohol can lead to organ damage. These damages are closely linked to the blood alcohol concentration in our body that keeps increasing over a period of time.


You can find a list of beverages and the alcohol content range for each of them below


Beer: 3 to 12%


Cider: 4 to 9%


Wine: 5 to 16%


Tequila: 40%


Vodka: 40%


Whiskey: 40 to 60%


Rum: 40 to 60%


Gin: 37.5 to 50%


Brandy: 35 to 60%


Liqueurs: 12 to 60%

What is the formula for Alcohol?


Alcohol is an organic compound that is not limited only to Ethanol. A normal characterization of Alcohol is when one or more hydroxyl groups are attached to a carbon atom to form an alkyl group. Alcohol can also be considered as the organic derivative of water. In simpler words, it could mean that the hydrogen atoms (H20) would be replaced by an alkyl group. With Ethanol or Ethyl Alcohol, the alkyl group would be the ethyl group which is – CH₂CH₃.


Alcohol is also one of the most commonly found organic compounds. You can find them in a lot of things, right from your mouthwash to the perfumes. Traces of alcohol compounds are found in a wide variety of products. Ethanol and Methanol are two of the most popular forms of alcohol. Ethanol is used in a variety of products, ranging from Alcoholic Beverages to Perfumes, Toiletries, Fuel and Pharmaceuticals. On the other hand, Methanol is largely used as a raw material to manufacture Formaldehyde. It is also used in special resins that can be found in cleaning equipment and antifreezes.

Alcohol Facts


– The only type of alcohol you can consume without damaging your body is Ethanol or Ethyl alcohol. Ethanol can be commonly found in alcoholic beverages like Beer, Wine, Vodka and other spirits.


– Alcohol can slow down the activity in your brain. While it acts as stimulant and gives you the feeling of excitement, it is classified as a depressant.


– The stimulant we spoke about earlier is because of Dopamine. Alcohol emits Dopamine, a neurotransmitter associated with pleasure and satisfaction.


– According to the National Survey on Drug Use and Health, in 2015, 86.4 percent of adults have had an alcoholic drink at some point in their life. 70.1 percent of adults had a drink in the previous year, and 56 percent consumed alcohol as early as the month before.


– Alcohol is a stress buster too, thanks to another neurotransmitter that is emitted after the consumption of alcohol, called GABA.


– Alcohol is processed in the liver. The enzymes in the liver help break down the ethanol into acetaldehyde and acetate.


– Men are more likely to consume alcohol than women.


– Women addicted to alcohol are 50 to 100 percent more likely to die from an alcohol related issue than their male counterparts.


– Alcohol may be older than most things around us. Some studies suggest that it is as old as civilization. Residue from alcoholic beverages dating back to 7000 – 6,6000 B.C have been found in China.


– Archaeologists have found evidence which suggests that the workers who built the Great Pyramids of Giza were paid in beer.


– Teens who start drinking alcohol before the age of 15 are likely to develop alcohol dependencies later on in their adult life.


– Culture plays a big part in how people consume alcohol. A study suggested that families in Italy that indulged in drinking with their family meals, were unlikely to develop any unhealthy drinking habits later on in their lives.


– Alcohol carries significant risk factors which could cause Dementia.


– Drinking red wine in moderation is good for the heart. Red wine contains resveratrol, a substance that helps in controlling cholesterol levels, stop blood clots and reduce any blood vessel damage.


– Legal age for consumption varies around the world and can be anywhere from 10 to 25 years.

Myths about Alcohol


– A cup of coffee helps in sobering up


Coffee, like tea or even alcohol for that matter, is a stimulant. This is because it contains caffeine. Coffee does help in making you feel more alert and in control of your sense, but it does not help your body in processing alcohol faster. That only happens with time, as your body needs time to break down the alcohol in your system, and help you get sober. Coffee may help you be awake, but you will be just as disoriented as you were before, which is much worse.


– Drinking alcohol isn’t a problem as long as you handle it


Not only is this far from the truth, it is also terrible advice. Being able to drink without effects of alcohol means your body is developing a higher tolerance for alcohol. This does not in any way mean that your body is immune to the hazardous effects of alcohol. Regular alcohol over a period of time can put you at a risk for Alcohol Use Disorder (AUD).


– Drinking in moderation is always safe


It is true that anything in moderation is a good idea. Drinking spirits like wine may also have some inadvertent health benefits. However, it does not mean that it’s completely devoid of risks for everyone. For some people, the risks may even outweigh the benefits.


Pregnant women, people on prescription medication and people that have had a stroke or are suffering from heart, liver or pancreatic diseases should avoid alcohol. Similarly, it’s best to practice restraint if you are dealing with AUD, or have been suffering from alcohol dependence.


Drinking before driving or operating heavy machinery also endangers you and the people around you. So drinking in moderations is NOT always safe.


– Wine or Beer won’t make you as drunk as hard liquor


A nice wine or a craft beer is delicious and much easier to enjoy than hard liquor. However, just because it is smoother in nature and easier to consume does not mean that it is not as potent. Simply because the intoxicating agent is the same across different beverages. So always ensure you drink responsibly.


– Switching between drinks can cause a hangover


It is not the switching between drinks but the amount of alcohol you consume, along with the concentration of Congeners in them. Congener is a toxic byproduct of alcohol that is responsible for some of its negative physiological effects. Primarily, the Congener plays a big part in whether you get a hangover or not, and not the mixing. This does not mean you mix drinks. But if you do, just be mindful of how much you are drinking. And don’t be reckless, as the hangover the next day will not be worth it. Also, drink a lot of water. Staying hydrated helps in fighting hangovers.

Got any questions? Feel free to get in touch.