Conversion formula exactly how to transform 128 pounds come kilograms?

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

We can collection up a ratio to fix for the number of kilograms.

You are watching: How much is 128 pounds in kg


Now, us cross main point to solve for our unknown x:




Conversion in the contrary direction

The station of the conversion factor is that 1 kilogram is equal to 0.0172236142331936 time 128 pounds.

It can additionally be expressed as: 128 pounds is equal to 1 0.0172236142331936 kilograms.


An almost right numerical an outcome would be: one hundred and also twenty-eight pounds is around fifty-eight allude zero 6 kilograms, or alternatively, a kilogram is about zero allude zero 2 times one hundred and twenty-eight pounds.

Units involved

This is exactly how the units in this conversion room defined:


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

Wikipedia web page of pounds


The kilogram is the base unit of mass in the international System of devices (the Metric system) and also is identified as being same to the mass of the international Prototype the the Kilogram. The avoirdupois (or international) pound, offered in both the imperial and US customary systems, is defined as precisely 0.45359237 kg, make one kilogram approximately equal come 2.2046 avoirdupois pounds. Other timeless units the weight and mass roughly the civilization are also defined in terms of the kilogram, do the IPK the main standard for essentially all devices of massive on Earth.

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Wikipedia web page of kilograms


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