What is it?
A kg is the base unit of mass in the International System of Units (SI). It may also be noted as the weight of volume of pure water equal to the cube of the hundredth part meter in the temperature of melting ice.
Background story
Back in the olden days, what defined relationships among countries was their trade routes and war of course. Trade was something that all sides engaged in because they could not produce everything they needed in their own country. As is with most dealings there were the fears of theft and of fraud.
The pound
The pound is a useful unit of mass as well. It is most common in the imperial and United States customary law. There are different kinds of pounds with the most common one being the avoirdupois pound.
Background story
The original story of the pond dates back to trade and commerce done in the prehistoric area. Arabs are credited as to being the first’s foreigners to scout trade routes into both Africa and Europe. There was no standard measure of weight or currency at the time.
How to convert lbs to kilograms
Considering both are units of standard SI units, the conversion is pretty simple.
Conversion formula
The conversion factor from pounds to kilograms is 0.45359237, which means that 1 pound is equal to 0.45359237 kilograms:
Alternative conversion
We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilogram is equal to 0.0099756679721664 × 221 pounds.
Approximate result
For practical purposes we can round our final result to an approximate numerical value. We can say that two hundred twenty-one pounds is approximately one hundred point two four four kilograms:
Conversion table
For quick reference purposes, below is the conversion table you can use to convert from pounds to kilograms
Conversion units
The units involved in this conversion are pounds and kilograms. This is how they are defined:
Convert 221 Pounds to Kilograms
To calculate 221 Pounds to the corresponding value in Kilograms, multiply the quantity in Pounds by 0.45359237 (conversion factor). In this case we should multiply 221 Pounds by 0.45359237 to get the equivalent result in Kilograms:
How to convert from Pounds to Kilograms
The conversion factor from Pounds to Kilograms is 0.45359237. To find out how many Pounds in Kilograms, multiply by the conversion factor or use the Mass converter above. Two hundred twenty-one Pounds is equivalent to one hundred point two four four Kilograms.
Definition of Pound
The pound or pound-mass (abbreviations: lb, lbm, lbm, ℔) is a unit of mass with several definitions. Nowadays, the most common is the international avoirdupois pound which is legally defined as exactly 0.45359237 kilograms. A pound is equal to 16 ounces.
Definition of Kilogram
The kilogram (or kilogramme, SI symbol: kg), also known as the kilo, is the fundamental unit of mass in the International System of Units. Defined as being equal to the mass of the International Prototype Kilogram (IPK), that is almost exactly equal to the mass of one liter of water.