The Conversations Continue I Have Not Been Shut Down Life is Good
Fluid measurement is one of the areas of mathematics we all encounter in our daily lives. Whether measuring ingredients for a cooking recipe or mixing beverages, or other liquids such as paint, liquids often require precise measurement.
This guide will introduce you to precise definitions and conversions for some of the units that we all use everyday. As you will see, there are many standards of liquid measurement, varying from great to small. In addition, some of them have rather unusual, and exciting, origin stories.
The Quart, and Its Origin
The quart is a unit of measure commonly used for doling out liquids including the following:
- Beer
- Water
- Jam
- Sealant
- Paint
Measuring with the quart goes back at least to Latin times, from which we get the etymology of the word "quart." In more recent history, the French word "quart" is more directly responsible for bringing us the English version of the word. In French, the word means "one quarter," and it signified a quarter of a gallon.
This is the measure commonly still in use today, with a quart representing a quarter of a gallon.
The gallon is a bigger unit of measurement than the quart. However, in history, the gallon itself has frequently changed in size depending on the country of use.
Great Britain is one of the countries responsible for bringing use of the gallon into modern times. In 1824, the Brits made an effort to standardize the definition of the gallon, in a departure from the loose and fast traditions of the Medieval Ages.
They defined the gallon as: "the volume occupied by 10 imperial pounds weight of distilled water weighed in air against brass weights with the water and the air at a temperature of 62 degrees of Fahrenheit's thermometer and with the barometer at 30 inches."
In the US, however, the gallon is a fluid volume of 231 cubic inches. In weight, it weighs about 8.34 pounds when containing water.
Some useful conversions for gallons are as follows:
- One gallon = Eight pints
- One gallon = 32 gills
- One gallon = Four quarts
- 3.75 liters = One gallon
The Ounce
Another popular unit of liquid measurement is the fluid ounce. The ounce, however, is not just useful for liquid measurements, but also for measuring mass. While the fluid ounce measures liquids, the ounce is also a standalone measurement for mass. Let's see how these two vary.
First, the fluid ounce. This unit, like the gallon, goes back to old times. Whereas an American gallon is defined as 231 cubic inches, the fluid ounce is half of what was known as a gill. The gill, in turn, is a quarter of a pint.
Though the gill has largely fallen out of use, 32 of these constituted a gallon. This means that, where a fluid ounce is a quarter of a gill, then it would take 128 fluid ounces to fill a gallon, which is, indeed, the case.
Hence, the conversion rule for ounces to gallons is:
One gallon = 128 fluid ounces (fl oz)
The ounce for mass measurements comes from the ounce of Roman times. The word "ounce" comes from "onza," which is the Italian rendering of the ounce of Roman times. An ounce was defined then as the twelfth part of a Roman pound.
In modern times, the US ounce is convertible into pounds using the following ratio:
One pound = 16 ounces
The Cup
The measure of a cup is commonly used in cooking and other areas where small amounts of fluid are used. A cup is two gills, or eight ounces. The cup may also be defined more precisely by its liquid volume, which is 14 7/16 cubic inches.
To convert between cups and ounces or gallons, use the following conversions:
One cup = Eight ounces
One gallon = 16 cups
Like the other measures, cups can also be used as a measure of mass. In this measure, a dry cup is equivalent to 1.164 liquid cups.
Source: https://www.life123.com/article/liquid-measurements-and-conversions-useful-for-daily-life?utm_content=params%3Ao%3D740009%26ad%3DdirN%26qo%3DserpIndex&ueid=39e2e516-8df1-4617-be0e-97c5f57aa8fe
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