Conversion formula just how to convert 5 pounds come kilograms?

We recognize (by definition) that:1⁢lb≈0.45359237⁢kg

We can set up a proportion to resolve for the number of kilograms.

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Now, we cross main point to settle for ours unknown x:




Conversion in the opposite direction


An approximate numerical an outcome would be: five pounds is around two allude two 7 kilograms, or alternatively, a kilogram is about zero point four four times 5 pounds.

Units involved

This is just how the devices in this conversion room defined:


The lb or pound-mass (abbreviations: lb, lbm for many pounds) is a unit the mass provided in the imperial units, United claims customary and also other solution of measurement. A variety of different interpretations have to be used, the most common today being the worldwide avoirdupois pound which is legally identified as precisely 0.45359237 kilograms, and also which is divided into 16 avoirdupois ounces.<3> The international standard symbol for the avoirdupois pound is lb.The unit is descended from the roman libra (hence the abbreviation lb). The English word pound is cognate with, among others, German Pfund, dutch pond, and also Swedish pund. All at some point derive native a borrowing right into Proto-Germanic that the Latin expression lībra pondō a pound by weight, in which the word pondō is the ablative situation of the Latin noun pondus.

Wikipedia page of pounds


The kilogram is the basic unit of mass in the global System of devices (the Metric system) and is characterized as being same to the fixed of the global Prototype that the Kilogram. The avoirdupois (or international) pound, used in both the imperial and US customary systems, is characterized as precisely 0.45359237 kg, making one kilogram around equal come 2.2046 avoirdupois pounds. Other timeless units the weight and also mass around the human being are additionally defined in regards to the kilogram, make the IPK the major standard for practically all units of mass on Earth.

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Wikipedia web page of kilograms


<1> The precision is 15 significant digits (fourteen number to the ideal of the decimal point).