In the United States, a "quarter" is a common informal term used to refer to a quarter of various units of measurement, such as a quarter of a dollar, a quarter of a year, or a quarter of other divisible quantities. However, when used in the context of weight or mass, a "quarter" typically refers to a quarter of a hundredweight (cwt).
Since a hundredweight (cwt) in the United States is equal to 100 pounds (lbs), a quarter of a hundredweight is equal to:
1 quarter (US) = 25 pounds (lbs)
So, when you see "quarter" used in the context of weight or mass in the United States, it generally means 25 pounds. This term is often used informally, especially in agricultural or trade contexts, to refer to a convenient fraction of weight.
A "kilopound" is not a standard unit of measurement in the International System of Units (SI) or in most common systems of measurement. Instead, it appears to be a non-standard or non-conventional term that combines two different units of measurement: "kilo" and "pound."
Kilo (k): Kilo is a prefix in the metric system that denotes a factor of 1,000. For example, one kilogram (kg) is equal to 1,000 grams.
Pound (lb): Pound is a unit of mass or weight commonly used in the United States and the United Kingdom, and it is abbreviated as "lb" (singular) or "lbs" (plural).
If someone were to use the term "kilopound," they might be referring to a weight or mass measurement that is equal to 1,000 pounds. However, this is not a standard or widely recognized unit of measurement. In most contexts, large masses are measured in tons or metric tonnes (1 tonne = 1,000 kilograms), rather than using "kilopounds."