To convert from other units of weight to pounds, we need to use the inverse of these conversion factors. Here are some common conversion factors for pounds: Therefore, one pound is equal to 0.45359237 kilograms. For example, to convert pounds to kilograms, we need to know that one kilogram is equal to 2.2046226218 pounds. To convert pounds to other units of weight, we need to use conversion factors that relate the pound to the desired unit. The pound was officially adopted by the International System of Units (SI) in 1960 as one of the seven base units. The pound, as well as other units of weight, such as the ounce and the ton, were introduced in the 19th century as part of the imperial system of measurement that aimed to unify the units used in the British Empire. The avoirdupois pound was standardized in 1959 by an international agreement among the United States, Canada, Australia, New Zealand and South Africa as exactly 0.45359237 kilograms. The pound as we know it today is based on the avoirdupois system, which was developed in the 13th century in France and England. The libra was later adopted by various regions and countries in Europe, such as England, France and Germany, with different values and subdivisions. The pound was originally defined in ancient Rome as the mass of a bronze bar called a libra, which was divided into 12 ounces. One pound can also be written as lb or lbs. It is equal to 0.45359237 kilograms, or 16 ounces, or 7000 grains. Pounds: A Unit of Weight Definition of the PoundĪ pound is a unit of weight that measures how much force an object or substance exerts on a scale due to gravity. Please note this is weight to volume conversion, this conversion is valid only for pure water at temperature 4 ☌.ġ US qt = 0.946352946 liters = 0.946352946 kg of pure water at temperature 4 ☌.

Gallon (gal) is a unit of Volume used in Cooking system. Standardized measuring cups are used instead.Pound (lb) is a unit of Weight used in Standard system. Actual drinking cups can vary significantly in terms of size and are generally not a good representation of this unit.

customary teaspoons.Ĭurrent use: The cup is typically used in cooking to measure liquids and bulk foods, often within the context of serving sizes. One United States customary cup is equal to 236.5882365 milliliters as well as 1/16 U.S. The metric cup is defined as 250 milliliters. Cup (US)ĭefinition: A cup is a unit of volume in the imperial and United States customary systems of measurement.

The imperial gallon is used even more sparingly than the US gallon, with most countries around the world using liters when referencing fuel. 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). Definition: A gallon is a unit of volume specifically regarding liquid capacity in both the US customary and imperial systems of measurement.

46 cups to gallons