What is the definition of a kilogram?
Prior to the current definition, the kilogram was defined as being equal to the mass of a physical prototype, a cylinder made of a platinum-iridium alloy, which was an imperfect measure.
Where did the word "kilogram" come from?
History/origin: The name kilogram was derived from the French "kilogramme," which in turn came from adding Greek terminology meaning "a thousand," before the Late Latin term "gramma" meaning "a small weight.". Unlike the other SI base units, the kilogram is the only SI base unit with an SI prefix.
How many ounces are in a pound?
The avoirdupois pound is equivalent to 16 avoirdupois ounces. History/origin: The pound descended from the Roman libra, and numerous different definitions of the pound were used throughout history prior to the international avoirdupois pound that is widely used today. The avoirdupois system is a system that was commonly used in the 13 th century.
When was the kilogram invented?
A new definition of the kilogram was introduced in 2019 based on Planck's constant and changes to the definition of the second.
Where is the kilogram used?
Current use: As a base unit of SI, the kilogram is used globally in nearly all fields and applications, with the exception of countries like the United States, where the kilogram is used in many areas, at least to some extent (such as science, industry, government, and the military) but typically not in everyday applications.
Is kilogram a base unit?
Unlike the other SI base units, the kilogram is the only SI base unit with an SI prefix. SI is a system based on the meter-kilogram-second system of units rather than a centimeter-gram-second system. This is at least in part due to the inconsistencies and lack of coherence that can arise through use of centimeter-gram-second systems, ...
Is the pound a unit of weight?
Current use: The pound as a unit of weight is widely used in the United States, often for measuring body weight.
Alternative conversion
We can also convert by utilizing the inverse value of the conversion factor. In this case 1 pound is equal to 0.008247134 × 55 kilograms.
Approximate result
For practical purposes we can round our final result to an approximate numerical value. We can say that fifty-five kilograms is approximately one hundred twenty-one point two five four pounds:
Conversion table
For quick reference purposes, below is the conversion table you can use to convert from kilograms to pounds
Conversion units
The units involved in this conversion are kilograms and pounds. This is how they are defined: