Pound Unit Math

In the united states the modern pound unit is defined to be 2 20462234 pounds per metric kilogram.

Pound unit math. However in roman times the libra pound was about 0 3289 kilograms and was divided into 12 uncia or ounces. Not exactly but that s a pretty good approximation. The pound or pound mass is a unit of mass used in the imperial united states customary and other systems of measurement. A unit of mass or weight defined as 0 454 kg.

In britain there has been more than one type of pound including the avoirdupois point and troy pound. 1 pound 16 ounces the abbreviation is lb because it came from the latin word libra. To calculate the price per pound the total price is divided by the weight in pounds. There are 16 ounces in 1 pound.

If given a value in kilograms all you need to do is multiply it by 2 2 to get the answer in pounds. The international standard symbol for the avoirdupois pound is lb. A pound sterling was a tower pound of silver but the standard was changed to the troy pound in 1528. The pound when we have 16 ounces it can also be called a pound lb.

So we ll just put this in a box. For example if 3 pounds of apples cost 5 then 5 is divided by 3 to arrive at the price per pound of 1 67. And 1 pound if you just take 1 over that 1 pound is approximately equal to 0 45 kilograms. The most common today is the international avoirdupois pound which is legally defined as exactly 0 45359237 kilograms and which is divided into 16 avoirdupois ounces.

The unit is descended from the roman libra. And it s good to know in general if you re converting between the metric and the english systems. An alternative symbol is lbm and or. The word per means for each and the word can be replaced with a division symbol in most instances such as miles per gallon or price per unit.