Scandinavian Mythology

Since it is Halloween I thought I’d make a fun post (not a super fact) about Scandinavian Mythology or folklore. I live in Texas, but I am originally from Sweden so the various beings I’ll describe or mention below are beings that I grew up hearing about. When I was a kid, we kids used to scare each other with stories about these beings.

I should also point out that it is not ancient Viking mythology but more recent folklore that some people still believe in. I am focusing on Swedish folklore and Norwegian folklore since it is similar to Swedish folklore. Danish folklore is a little bit different, but it has many similarities to Swedish and Norwegian folklore. Denmark is a Scandinavian country, but the post would be too long if I included folklore that is specifically Danish.

I am providing one or more pictures for each being. These pictures are either in the public domain, for example via Wikipedia, or shutter-stock pictures (I have a subscription), or pictures I generated with the help of ChatGPT with varying success. The beings covered are Tomte, Vittra (Vitter folk), Elf, Skogsrå/ /Tallemaja/Huldra, Näcken/Fossegrim, Troll, Myling, Storsjö odjuret (the north Swedish equivalent of the Loch Ness monster), Kraken, and Skvader. Finally, Blodstämmare is not a being but a north Swedish magical practice that you use to remotely stop the blood flow in a person.

Tomte

Tomtar (plural of Tomte) or Nisse in Norwegian is a type of small magical people, or gnomes, related to Vitter folk (described below). They are friendly and is the inspiration behind the Swedish version of Santa Claus, which is therefore a bit different from the Disney version of Santa Claus that has become so popular.

For one thing, the Disney version of Santa Claus works alone while delivering presents and therefore needs to move faster than the speed of light to cover all the good children. A Tomte may help you with your projects and duties if you are nice to them. They may help you with your farm and your animals, warn you of danger, and bring you gifts for Christmas if you in return put out food for them, such as porridge. As mentioned, there are many Tomtar, often one Tomte per house.

A Tomte wearing a red hat in a snowy winter forest. | Scandinavian Mythology
An illustration of a Tomte. Shutterstock ID: 2060057882 by PLIMPLUM.
An old illustration of a Tomte conversing with a sitting cat.
A Tomte or a Nisse, about as big as a cat, Erik Werenskiold, Public domain, via Wikimedia Commons
Tomte with a beard wearing a red pointed hat | Scandinavian Mythology
Tomte generated by ChatGPT

Vittra

Vittra or Vitterfolk are supernatural spirits or small invisible people who have a lot in common with people as well as Tomtar. They own cattle and they sometimes interact with people. Usually, they stay out of your way, but if you hurt them, for example by throwing hot water out the window without warning them first, they may take revenge on you and burn down your house. Vittra are not evil but not friendly either.

The belief in Vittra is especially prevalent in northern Sweden. On the Swedish island of Gotland, they are often referred to as “Di små undar jordi” in the Got/Goth dialect, or “De små under jorden” in proper Swedish, or “the small ones below ground” in English. They are sometimes depicted as looking similar to Tomtar, gnomes or elves, and sometimes as invisible, or near invisible little spirits. Below are some depictions of Vitter folk.

A Vitter is sitting on a log in the forest and baby cow is standing in front of him.
A Vitter and his mini calf. Generated with the help of ChatGPT

Elf

An elf, or elves in plural, is a type of human like supernatural being in Germanic folklore and especially Nordic/Scandinavian folklore. Since elves have been popularized around the world it is a well known being. In Scandinavian mythology they were initially often considered bad news but because of popular culture, such as Tolkien’s books, they have been redeemed into something positive. The first picture below is from a Swedish children’s book written in 1910. I read this book when I was a child. The wispy creatures are elves and the small kids with mushroom hats are Tomte children. In this book the elves are depicted in a Nordic pre-modern fashion, but they are nice.

Wispy spirit like elves are sitting on a log. The Tomte children are standing next to them and talking to them. The Tomte children are wearing red mushroom hats. | Scandinavian Mythology
Little älvor, playing with Tomtebobarnen. From Children of the Forest (1910) by Swedish author and illustrator Elsa Beskow. Elsa Beskow, Public domain, via Wikimedia Commons
Around 20 white dressed female elves are dancing on a meadow.
Ängsälvor (Swedish “Meadow Elves”) by Nils Blommér (1850). Nils Blommér, Public domain, via Wikimedia Commons.
A female elf in the forest. She is holding a lantern. | Scandinavian Mythology
A female elf that I generated with the help of ChatGPT
One male elf and three female elves standing in a clearing.
Four elves (one male, three females) standing in a forest glade. I generated this picture with the help of ChatGPT.

Skogsrå,  Tallemaja, Huldra

Skogsrå or Tallemaja in Swedish folklore is a seductive female creature who lures men with her beauty or beautiful singing and then kills the men. The Skogsrå / Tallemaja typically has a tail and a hollowed out back, which you can’t see if you are facing each other. In Norwegian this creature is called Huldra (Hulder in plural).

It should be noted that I read that if you meet a Huldra in the forest and you treat her with respect she will not kill you. She would just enjoy your company for a while, talk to you, sing to you, show you the beauty of the forest, and then she would let you go. It is only the rude and selfish men who don’t respect her boundaries whom she kills.

An image AI-illustration of a Huldra
Imagining how a Huldra would look like. Stock AI-generated image ID: 2400845203 by Shutterstock AI Generator.
Two lightly dressed huldras / nymphs resting by a creek in the forest. | Scandinavian Mythology
Huldra’s Nymphs (1909) by Bernard Evans Ward, Public domain, via Wikimedia Commons
A Tallemaja with pointed ears and red hair. She is wearing a green dress, and she is standing in the forest.
A Skogsrå, Tallemaja or Huldra that I generated with the help of ChatGPT
A Skogsrå with pointed ears and red hair. She is wearing a green leafy dress, a crown of leaves, and she is standing in the forest. | Scandinavian Mythology
Another picture of a Skogsrå, Tallemaja or Huldra that I generated with the help of ChatGPT.
A Tallemaja with long hair. She is wearing a brown dress, a pointy hat, and she is standing in the forest.
A Tallemaja that I generated with the help of ChatGPT.

Last summer (a bit more than one year ago) we visited Sweden and Norway. One day we took a tour into the Norwegian mountains and fjords. We took a two-hour cruise on Sognefjord and after the cruise we took a train to the top of the surrounding mountains. Along the way we encountered a Huldra by a waterfall. She sang to us in her beautiful voice, and she seduced us all, both men and women, to take photos of her with our phones and posting them on social media. It was a tourist ploy of course. You can read more about our trip here .

A waterfall in the mountains. A woman in a red dress is standing to the right of the waterfall.
My photo of the Huldra (in red) by the waterfall in the Norwegian mountains. She seduced us all into taking photos of her for Facebook. Her seductiveness was feared in medieval times, but in modern times we refer to the seductiveness of the Huldra as a “tourist trap”.
Blurry image of a Huldra dressed in red standing on a mountain side. | Scandinavian Mythology
A close up of the Huldra we encountered. Sorry, my phone camera is the best and it was at a distance.

Näcken, Fossegrim

Näcken, Strömkarlen, or Fossegrim in Norwegian is a male creature who lives by the water, creeks, rivers, ponds and lakes. He plays a harp or a violin He lures children and others to their death. In southern Sweden (Scania) he seduces people by skillfully playing a violin thus creating irresistible music.

Greenish statue of Fossegrim standing in a small waterfall playing a harp. | Scandinavian Mythology
Bjørn som tegner, CC BY-SA 3.0 <https://creativecommons.org/licenses/by-sa/3.0&gt;, via Wikimedia Commons
Näcken or Strömkarlen is sitting on a rock in a creek playing a harp. | Scandinavian Mythology
A picture of Näcken that I generated with the help of ChatGPT

Troll

Troll, or Trolls in plural, are large ugly creatures with magical powers. They typically live in caves and sunlight is dangerous to them. They are typically hostile to humans and may kidnap people, including children, to work in their mines. Trolls are called Trolls in both Swedish and Norwegian.

Four big Trolls sitting next a shiny white female elf.
Look at them, troll mother said to the elf girl. Look at my sons! You won’t find more beautiful trolls on this side of the moon. (1915) by John Bauer. John Albert Bauer (4 June 1882 – 20 November 1918) was a Swedish painter and illustrator. wikipedia public domain.
A troll standing in the forest
A picture of a troll that I generated with the help of ChatGPT
A troll standing in the forest | Scandinavian Mythology
Another picture of a troll that I generated with the help of ChatGPT
A very ugly troll standing in the forest
A picture of a troll, a slightly different style, that I generated with the help of ChatGPT

Myling

Before modern contraception, infanticide was one way for parents to limit the number of children they had. Unwanted and out of wedlock children were often killed. It is part of our human dark history. These babies were not baptized and in old Scandinavian mythology they became restless spirits seeking revenge on the mother or both parents. Alternatively, they caused mischief until they could convince someone to at least bury them properly. These restless baby spirits are referred to as myling or mylingar in plural.

A myling in the middle of a room of a cottage. The myling looks like a small shiny ghost. It is dark in the cottage and there is a window and a candle. | Scandinavian Mythology
A picture of a myling that I generated with the help of ChatGPT

Storsjö odjuret

Storsjöodjuret is a large sea serpent like Swedish lake monster like the Loch Ness monster. It resides in a lake in northern Sweden. The English translation of Storsjö odjuret is the monster of the Great Lake. Storsjö / Great Lake is not far from where I grew up. I should say this monster has been hundreds of times since 1635 and seems to have been depicted on a rune stone from the 11th century.

A runestone with runes and a picture of snake like creature.
The Frösö Runestone from the mid-11th century. Frösö is an island located in the middle of Storsjö. In the legend from 1635 Storsjöodjuret is said to be the serpent depicted on the stone. Andreaze, Public domain, via Wikimedia Commons
Depicted is a large sea serpent like creature with a horse like head and a fish tail. | Scandinavian Mythology
A picture of storsjoodjuret that I generated with the help of ChatGPT

Kraken

Kraken is a gigantic octopus that can bring down entire ships. It is more of a Norwegian creature but also Swedish.

An old illustration of a giant octopus climbing all over a ship.
Pierre Denys de Montfort (1766–1820) / Étienne Claude Voysard (1746–1812.), Public domain, via Wikimedia Commons

Skvader

The skvader is a Swedish fictional creature that looks like a mix of a wood grouse and a hare. It started with a taxidermist creating a mixture of the two animals, taking a photo, and a rumor spread that it was real. I am remember watching debates on Swedish TV on whether the creature was real or not. People love to believe strange things. Yet another reason we scientifically valid evidence.

A photo of animal that looks like a mix of a wood grouse and a hare.
Unknown photographer, Copyrighted free use, via Wikimedia Commons

Blodstämmare

This is not a creature but a very common superstition in northern Sweden. There are people, blodstämmare, who can stop the flow of blood by uttering magical phrases while focusing their minds on the person in question. This power is usually used for helping people who are bleeding. It can also be used for evil, like black magic, to stop the blood flow in someone’s heart. This superstition is based on Sami (indigenous north Scandinavian people) Shamanism and north Swedish Christian fundamentalism (Laestadians). It is respected enough that some north Swedish hospitals have used blodstämmare in emergency situations.

The father of a close friend of mine called a blodstämmare when he had a bad nosebleed, and it worked. I know anecdotes are not valid scientific evidence. It is just a good story.

Happy Halloween



To see the Super Facts click here

The two main classes of beer are Ales and Lagers

Super fact 50 : There are hundreds of types of beer but in general they fall into two main categories, ales and lagers, and these two categories are not differentiated based on color. The ales are not necessarily dark and lagers light. There are light colored ales and dark, even black ales. There are light colored lagers and dark and almost black lagers (Schwarzbier). The difference between ales and lagers is the type of yeast used and the fermentation temperature. Ales are typically made with top-fermenting yeast at warmer temperatures. This result is a wider range of flavors and aromas, often with fruity or spicy notes. Lagers, on the other hand, are made with bottom-fermenting yeast at cooler temperatures making them crisper and more subtle. Ales have been around for 6,000 years. The lager is a more recent invention.

I consider this a super fact, first, because even though beer is a well-known drink that a lot of us drink almost every day, a lot of people don’t know what the two basic kinds of beer are. They don’t know what an ale is or what a lager is. Even beer fans and many people who drink beer every day are often clueless about this, the most basic fact about beer. A lot of people say that they like light/blond beer or they like dark beer. In my native country Sweden, which I admit is not a true beer country, I often hear people say that they prefer “ljus öl” (light/blond beer) rather than “mörk öl” (dark beer), or the other way around, which is like saying that you like blond / light colored food rather than dark colored food. It doesn’t make sense.

On the left, glass with black beer. It has a mocha-colored head. On the right is the bottle. The label says Das Schwarze.
This is a so called Schwarzbier that I drank some time ago. Das Schwarze a German Schwarzbier from Dinkelacker-Schwabenbräu, ABV 4.9%. Some roasted notes, sweet caramel, light flavor, a bit fizzy, somewhat thin but good enough. This is a Lager but notice a how dark it is, basically black. I did not put black dye in it. It is how they really look despite being Lagers.

I am in the process of learning Franch, and I’ve discovered that this confusion is even baked into the French language. Well as you might guess France is not a true beer country. If you use Google Translate and you type in “Lager” in the English edit box the answer you get in French is “Bière blonde”, even though French and Belgian beer that are labeled Blonde frequently are Ales not Lagers. I’ve read a lot of French language sites mentioning beer, and unless the author has some beer expertise, they make the same mistake as Google Translate. Blonde / light beer is not Lager, and dark beer is not necessarily Ale.

I had a discussion about this with one of my French teachers and despite me having talked a lot about beer in class and having previously shown him that I knew something about the topic, he had a very hard time accepting the truth. After a Google search he finally accepted the truth, but he was very surprised, perhaps even shocked.

The confusion is immense, it is worldwide, and the truth is surprising to some people. I should mention that Americans for the most part get this right. In general Americans know that Lager isn’t necessarily blonde and vice versa. They know that IPAs, which are not Lagers but Ales, typically are light colored. Perhaps because of the prominent craft beer industry in the US. I should also mention that there are also hybrid beer styles and beer styles that are hard to classify as lager or ale. More about that later.

A tall glass with black beer on the left. A can with the label Ba Ba Black Beer on the right. Behind the beer glass you can see Sushi | The two main classes of beer are Ales and Lagers
This is Ba Ba Black Lager, an American Schwarzbier. I had sushi with this Schwarzbier.

Secondly, lagers, especially pale bland mass-produced lagers have become so common that when people taste an ale, especially if it is a little bit different, like fruity, tart, have chocolate or coffee flavors, etc., they don’t even consider it a real beer. In their minds real beer is a bland tasting lager. Never mind that we have had Ales for 6,000 years, and that Ales dominated beer drinking up to relatively modern times. Nowadays 90% of beer consumption worldwide is lagers (87% in the US), but throughout most of human history nearly 100% of beer consumption worldwide was ales.

On the left is an IPA glass filled with a golden colored clear IPA with a snow-white head. In the middle is the Cold War can and on the right is a garden gnome holding a mug. There is a sign next to the gnome, which says “Welcome to my beer garden.”
This is an IPA called Cold War. IPAs are NOT Lagers. However, notice how light the color is. IPAs are popular in the US, which I think is one reason Americans are better educated on the difference between lagers and ales to countries that are not part of the European beer countries (Germany, Britain, Ireland, Belgium, the Czech Republic, etc.)

What is an Ale?

As mentioned, an Ale is a style of beer, brewed using a warm fermentation method. Ales are typically made with top-fermenting yeast at warmer temperatures. This result is a wider range of flavors and aromas, often with fruity or spicy notes. The word ale is an English word which in medieval England meant a drink brewed without hops (it is not what it means today). Some popular ales include IPA, Pale Ale, Stouts, Porter, Scotch Ale, and Barley Wine.  Below is a more complete list of Ales. The list is from the beer advocate. Despite the 120 styles listed the list is not complete. It should be noted that I’ve added a few that were missing.

  • India Pale Ales : American IPA, Belgian IPA, Black IPA, Brut IPA, Cold IPA, English IPA, Imperial IPA, Milkshake IPA, New England IPA.
  • Pale Ales : American Amber / Red Ale, American Blonde Ale, American Pale Ale, Belgian Blonde Ale, Belgian Pale Ale, Bière de Garde, English Bitter, English Pale Ale, English, Pale Mild Ale, Extra Special / Strong Bitter (ESB), Grisette, Irish Red Ale, Kölsch, Saison.
  • Wild/Sour Beers : Berliner Weisse, Brett Beer, Faro, Flanders Oud Bruin, Flanders Red Ale, Fruit Lambic, Fruited Kettle Sour, Gose, Gueuze, Lambic, Wild Ale.
  • Wheat beers : American Dark Wheat Beer, American Pale Wheat Beer, Dunkelweizen, Grodziskie, Hefeweizen, Kristallweizen, Witbier.
  • Stouts : American Imperial Stout, American Stout, English Stout, Foreign / Export Stout, Irish Dry Stout, Oatmeal Stout, Russian Imperial Stout, Sweet / Milk Stout.
  • Porters : American Porter, Baltic Porter, English Porter, Imperial Porter, Robust Porter, Smoked Porter.
  • Dark Ales : Dubbel, Roggenbier, Scottish Ale, Winter Warmer.
  • Brown Ales : Altbier, American Brown Ale, Belgian Dark Ale, English Brown Ale, English Dark Mild Ale.
  • Strong Ales : American Barleywine, American Strong Ale, Belgian Dark Strong Ale, Belgian Pale Strong Ale, English Barleywine, English Strong Ale, Imperial Red Ale, Old Ale, Quadrupel (Quad), Scotch Ale / Wee Heavy, Tripel, Wheatwine.
  • Specialty Beers: Ancient Herbed Ale, Sahti.
On the left a Westvleteren glass filled with dark brown Westvleteren. On the right the Trappist Westvleteren bottle | The two main classes of beer are Ales and Lagers
Trappist Westvleteren from Brouwerij Westvleteren (Sint-Sixtusabdij van Westvleteren) a Belgian Quadruple might be the most renowned beer in the world. I’ve had it many times and it is heavenly. However, it is very difficult  to get in the US. A Quadruple is a type of Ale.
On the left a glass filled with the dark brown to black porter Plutonium-239. On the right the can with the label Plutonium-239.
Plutonium-239 from the Manhattan Project Brewing Company in Dallas, Texas. It is a strong-tasting Porter with coconut flavors. (chocolate, coconut and coffee). There is no clear definition on the difference between porter and stout, other than porters are in general milder and not as strong as stouts. From that perspective Plutonium-239 is really a stout.

Wild Ales and Sour Beers often have fruity flavors. This can be achieved by adding fruits or berries to them but often fruit flavors emerge naturally from the fermentation process, which, at least if you use wild yeast, produce esters (fruit flavors). Wheat beers often have banana or pear notes and just as for Wild Ales these flavors emerge naturally from the fermentation process (esters again). Some of the IPAs also have distinct fruit flavors, especially the New England style IPAs, but in this case the fruit flavors come from the hops.

On the right is a glass filled with dark red beer with a thick pink head. On the left is the Atrial Rubicite bottle | The two main classes of beer are Ales and Lagers
Jester King in Texas brews a Wild Ale called Atrial Rubicite. It is a Wild Ale infused with raspberries. The fermentation process uses “wild yeast” to create a tart and fruity base but raspberries are added to enhance the fruit flavor resulting in a thick full raspberry flavor which most people describe as heavenly.

What is a Lager?

As mentioned, lagers are made with bottom-fermenting yeast at cooler temperatures making them crisper and more subtle. The word lager (German) means to storage or storeroom and used to refer to beers stored at cold temperatures. Sometime in the 15th century cold fermentation yeast emerged, and people started using it to do fermentation at cold temperatures. As time went by this form of fermentation became more popular. It was brought to the US in 1840 and between 1860 and 1870 it became the most popular fermentation process in Bohemia. As mentioned, today 90% of beer consumption worldwide is lagers.

Below is a more complete list of Lagers. The list is from the beer advocate.

  • Pale Lagers: American Adjunct Lager, American Lager, Czech / Bohemian Pilsner, Czech Pale Lager, European / Dortmunder Export Lager, European Pale Lager, European Strong Lager, Festbier / Wiesnbier, German Pilsner, Helles, Imperial Pilsner, India Pale Lager (IPL), Kellerbier / Zwickelbier, Light Lager, Malt Liquor.
  • Dark Lagers : American Amber / Red Lager, Czech Amber Lager, Czech Dark Lager, European Dark Lager, Märzen, Munich Dunkel, Rauchbier, Schwarzbier, Vienna Lager.
  • Specialty Lagers : Japanese Rice Lager, Chile Beer
The picture shows two large blue Paulaner cans and my big one-liter Disneyland cup filled beer with a thick white head.
Paulaner is a so called Festbier (or Octoberfest), which is type of Lager made especially for Octoberfest in Germany.

Finally, there are also specialty beers that are hybrids, or neither or that can be both.

  • Hybrid (Ale/Lager): Bière de Champagne / Bière Brut, Braggot, California Common / Steam Beer, Cream Ale.
  • Neither lager or ale, or can be both : Fruit and Field Beer, Low-Alcohol Beer, Rye Beer, Smoked Beer, Herb and Spice Beer, Kvass, Gruit, Happoshu, Pumpkin Beer.

That’s 120 styles of beer. I’ve had 110 beer styles. How many have you had?

To see the other Super Facts click here

Measuring Alcohol by Volume in Home Brews

Image above by Kevin from The Beginning at Last

Measuring Alcohol by Volume in Home Brews
This is a submission for Kevin’s No Theme Thursday

Beer Styles

Look at that happy and friendly beer muse above. That is Kevin’s picture. Wouldn’t you like a beer? I like beer and I also brew beer at home. My dog Rollo loves it when I spill wort on the kitchen floor. The wort is what you have before fermentation. It is like a grainy sticky sweet soup, and he likes to lick it up. However, my wife does not like it when there’s sticky wort all over her kitchen floor and the stove. Everyone has their own perspective.

Our dark brown and white mini-Australian Shepherd is standing in the kitchen.
Rollo in the kitchen hoping for the wort to boil over or spill.
A beer garden gnome, a bottle of home brewed beer with a label saying Act on Climate Y’all and a glass of IPA with white foam. It is my homebrewed beer.
This is an IPA that I brewed at home, and it came out pretty good. Look how happy my beer garden gnome is.

Beer is one of the oldest alcoholic beverages in the world, dating back over 7,000 years to ancient Mesopotamia. There are more than 100 different styles of beer worldwide, with the main categories being lagers and ales. The beer advocate currently lists 120. Below are a few examples of Lagers and Ales.

Lagers : Pilsner, Märzen (Oktoberfest), Adjunct Lager, Pale Lager, Scwarzbier (a black lager), Bock.

Ales : IPA, Stout, Porter, Wheat Beer, Belgian Beer, Blonde Ale, Saison, Barley Wine, Lambic, Geuze

Brewing Beer at Home

When you brew beer at home you start by boiling the wort. You boil water and you add the malts and the hops for the flavoring and the aroma at specific times. This all depends on the recipe you are following. Warning! The wort easily boils over. Then you cool the wort (I use an ice bath to do this), add the yeast, and you let it ferment, typically for a couple of weeks.

You can add various things for flavoring, such as whiskey infused wood chips if you want your beer to have a taste of whiskey and wood (yes, I have done that). Whiskey and wood are great added flavors in stouts. After the two weeks of fermentation, you add sugar and bottle the beer and let it ferment for a few weeks before you put it in the fridge.

A black pan filled with yellow-beige boiling wort
Boiling wort on the kitchen stove. It contains water, malts, hops, and maybe sugar or honey.

A few words about the bottling process. The bottling process below is using siphoning instead of pouring to achieve some filtering and to avoid splashing. Splashing can cause excessive oxidation which can ruin the beer the same way bananas turn brown. This seems to matter for New England style IPAs, but not so much for other beer styles (my observation).

Carboy with siphoning tubing on the right. Pliny the Elder bottle and beer glass on the left | Measuring Alcohol by Volume in Home Brews
Here I am bottling beer while drinking a renowned IPA called Pliny the Elder, one of the best India Pale Ales in the world.

Measuring the alcohol content in home brews

When you brew beer at home you don’t have the advanced equipment that breweries sometimes do so measuring the alcohol content is a challenge. However, you can do it with an indirect method using a hydrometer. I will explain how to do this. There are instruction booklets, books and online websites that explain how to do this, but I will keep it short and succinct.

During the fermentation process, yeast converts sugars into alcohol (and carbon dioxide). As the sugar is used up, the wort slowly becomes less dense. By measuring the density before and after fermentation (using the hydrometer), you can calculate how much alcohol is in the finished beer. In the beer world this is called measuring the gravity, not to be confused with the fundamental force of attraction between objects with mass. You can buy a hydrometer in a lot of places including Amazon.

Long white plastic measuring cup with a hydrometer | Measuring Alcohol by Volume in Home Brews
This is a measuring cup (left) and a hydrometer (right). Don’t worry about markings on the measure cup. It is the markings on the hydrometer that you use.
Hydrometer with lots of markings | Measuring Alcohol by Volume in Home Brews
Close up of a hydrometer.

The density/gravity of water is used for reference as 1.000. To be exact, it also depends on the temperature, but for now we’ll ignore that. After the initial boil of the wort, and before you add the yeast, there is no alcohol in the wort. This is a good point to measure what is called original gravity (OG).

I should mention that you need to let the wort cool off before doing your measurement. The temperature at this point should be around room temperature, 72 degrees (60 to 75 degrees). Then after fermentation (in your container, carboy, whatever) you measure it again. This is called the final gravity (FG).

A long measuring cup with beer and a hydrometer in it | Measuring Alcohol by Volume in Home Brews
Original gravity/density Was 1.072. Final gravity/density was 1.018 (in picture).

I should add that after the fermentation in your container/carboy is done you add a little bit more sugar (called priming sugar), you bottle the beer, and you let it ferment a little bit more, which will add a little bit more alcohol as well as carbon dioxide. You want some carbon dioxide in the beer but not too much. This extra amount of alcohol is not accounted for using the final gravity. However, it is typically around 0.2% and if you wish to include it, you can just add that number.

Using the original gravity (OG) and the final gravity (FG) you can now calculate the ABV, Alcohol by Volume, by using the formula below. For this brew, an IPA (India Pale Ale), I got OG = 1.072 and FG = 1.018. Ideally FG is around 1.010, but for whatever reason I did not get there.

ABV = (OG – FG) x 131.25 = 0.054 x 131.25 = 7.1%

So that would be 7.3% with the bottle fermentation. That is a good enough measurement, but if you want precision, there is a more exact formula.

ABV = (76.08 x (OG – FG) / (1.775 – OG)) * (FG/0.794) = which in my case yields ABV = 7.23% which would yield 7.43% with the bottling. I can add the recipe predicted ABV = 7.5%. There are even more exact formulas that account for the temperatures at the points of measurement of original gravity and the final gravity. But that would be really nerdy.

To see the Super Facts click here