The metric system, which was an attempt to bring order to all of these various different measurements, happened much later in France after the French Revolution. customary system date back to the Roman Empire, pre-colonial merchants and traders, and these early pharmacists. For one thing, there was an "ale gallon" and a "wine gallon" because these items came in two different sized containers!Īlmost all measurements from the U.S. Quarts and gallons are primarily units of trade, and for a long time there wasn't a standard version, although a quart was always a quarter of a gallon (hence the name). People needed to know about how much a bushel was, and if they paid a certain amount of gold for a certain number of bushels, how much exactly were they getting. Gallons are related to the old-fashioned term bushel.
When people want to trade things, they need to know about how much stuff they are getting. All of their measurements came from earlier Roman systems of measurement, and most of these came about because of merchants and trade. A teaspoon is about the measurement of a dram, and was an unofficial measuring unit used by these apothecaries to represent one dram. They used pints, fluid ounces, drachms (drams), scruples, and minims. Back then, they compounded the recipes in the pharmacy itself, so everyone needed the same recipe.
#Covert 2.3 fluid ounces to cups how to
How to Convert Fluid Ounce (US) to Gallon (US)Įxample: convert 15 fl oz (US) to gal (US):ġ5 fl oz (US) = 15 × 0.0078125 gal (US) = 0.Most of these measurements came from ancient apothecaries who needed measurements for their medicinal recipes. The imperial gallon is used even more sparingly than the US gallon, with most countries around the world using liters when referencing fuel.įluid Ounce (US) to Gallon (US) Conversion Table Fluid Ounce (US) Gallons are also widely used in fuel economy expression in the US, as well as some of its territories. History/origin: The term gallon most closely originates from "galon" in Old Northern French and developed as a system for measuring wine and beer in England, resulting in measures such as the wine gallon, ale gallon, and imperial gallon.Ĭurrent use: In the United States (US), gallons are often used for larger containers, such as half gallon tubs of ice cream or one-gallon cartons of milk. A US fluid ounce is therefore 1/128 of a US gallon while an imperial fluid ounce is 1/160 of an imperial gallon. Further differentiating the US and the imperial gallon, a US gill is divided into four fluid ounces, while an imperial gallon is divided into five. A cup is comprised of two gills, making one gallon equal four quarts, eight pints, sixteen cups, or thirty-two gills. Quarts are then divided into two pints and pints are divided into two cups. In both systems, the gallon is divided into four quarts. In contrast, the imperial gallon, which is used in the United Kingdom, Canada, and some Caribbean nations, is defined as 4.54609 liters. The US gallon is defined as 231 cubic inches (3.785 liters).
Gallon (US)ĭefinition: A gallon is a unit of volume specifically regarding liquid capacity in both the US customary and imperial systems of measurement. It is mostly used in the United States and the United Kingdom, as one of the many measurements of volume used. After the adoption of the international inch in 1959, the US fluid ounce became equal to exactly 29.5735295625 mL.Ĭurrent use: As the name indicates, the fluid ounce is typically used as a measurement of liquid volume. The United States fluid ounce was initially based on the wine gallon used in England prior to 1824.
The imperial gallon's definition was later changed to be equal to 4.54609 liters, making the imperial fluid ounce equal to exactly 28.4130625 mL. In 1824, the imperial gallon was defined as the volume of ten pounds of water at a temperature of 16.7☌. History/origin: The fluid ounce was originally based on the volume occupied by one ounce (weight) of a given liquid such as wine or water, thus varying based on the system being used. The imperial fluid ounce is 1/20 of an imperial pint, and 1/160 of an imperial gallon, which is equal to 28.4 mL. The US fluid ounce is 1/16 of a US fluid pint, and 1/128 of a US liquid gallon, which is equal to 29.57 mL. Definition: A fluid ounce (symbol: fl oz) is a unit of volume in the imperial and United States customary systems of measurement.
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