Conversion formula exactly how to convert 5 pounds come kilograms?

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

We can collection up a proportion to solve for the variety of kilograms.

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Now, us cross main point to deal with for ours unknown x:




Conversion in the contrary direction


An approximate numerical an outcome would be: five pounds is around two suggest two 7 kilograms, or alternatively, a kilogram is about zero allude four 4 times 5 pounds.

Units involved

This is just how the units in this conversion are defined:


The pound or pound-mass (abbreviations: lb, lbm for most pounds) is a unit of mass offered in the imperial units, United claims customary and other equipment of measurement. A number of different definitions have been used, the most usual today gift the worldwide avoirdupois pound which is legally characterized as specifically 0.45359237 kilograms, and also which is separated into 16 avoirdupois ounces.<3> The global standard symbol because that the avoirdupois lb is lb.The unit is lower from the roman libra (hence the abbreviation lb). The English word lb is cognate with, amongst others, German Pfund, dutch pond, and Swedish pund. All ultimately derive indigenous a borrowing into Proto-Germanic of the Latin expression lībra pondō a pound by weight, in which words pondō is the ablative case of the Latin noun pondus.

Wikipedia page of pounds


The kilogram is the basic unit of mass in the international System of systems (the Metric system) and is defined as being equal to the mass of the international Prototype the the Kilogram. The avoirdupois (or international) pound, provided in both the imperial and also US customary systems, is identified as specifically 0.45359237 kg, do one kilogram around equal come 2.2046 avoirdupois pounds. Other timeless units the weight and also mass about the civilization are additionally defined in regards to the kilogram, do the IPK the primary standard for essentially all units of fixed on Earth.

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Wikipedia web page of kilograms


<1> The precision is 15 far-reaching digits (fourteen digits to the right of the decimal point).