Convert 198 grams to kilograms

Explanation

Let's convert 198 grams to kilograms, or g to kg as one could put it.

First, we need to calculate the conversion factor using the units respective values. We find 0.001.

Then we multiply this conversion factor by the number of grams. In this case 198.

Therefore, 198 grams is equal to 0.198 kilograms.

Formula

1 g=0.001 kg

198 g=198 × 0.001 kg

198 g=0.198 kg

gramsg

dimension	mass
system	International system of units (SI)
symbol	g
search alias	gm

The gram (g) is a unit of mass in the International System of Units.

Definition of the gram

One gram is equal to 0.001 kilograms.

History

The gram was introduced in 1795 by the French National Convention as "the absolute weight of a volume of pure water equal to that of a cube of one hundredth of a meter side, at melting ice temperature".

It was replaced by the kilogram as the base unit of mass in 1960 for the creation of the SI.

Equivalences

One gram is equivalent to:

SI Mass Units

nanogram	ng	0.000000001
microgram	µg	0.000001
milligram	mg	0.001
gram	g	1
kilogram	kg	1000
megagram	Mg	1000000

The International System of Units

The International System of Units or SI (from the French Système international (d'unité)), also called metric system in the U.S., is a coherent system of units that was published 1960. It is official in nearly every country.

The General Conference on Weights and Measures (Conférence générale des poids et mesures) is tasked with overseeing the SI.

kilogramskg

dimension	mass
system	International system of units (SI)
symbol	kg
synonyms	kilos

The kilogram (kg) is the base unit of mass in the International System of Units.

Definition of the kilogram

It is defined by taking the fixed numerical value of the Planck constant h to be 6.626 070 15 x 10^–34 when expressed in the unit J s, which is equal to kg m² s^–1, where the metre and the second are defined in terms of c and ∆ν_Cs.

Definition from the BIPM: Unit of mass

History

The first definition of the kilogram was "the mass of a liter of water". But this proved impractical and in 1889, the International Prototype Kilogram, a cylinder of platinum-iridium alloy, was made to serve as the reference.

In 1949 the mass of the IPK was found to be deverging from its copies. So, in order to ensure the stability of the unit, a new definition was devised based on the Planck constant and on 20 May 2019 this new definition came into effect.

Equivalences

One kilogram is equivalent to:

Some Facts

With an average of 1.4 kg (3 lbs), ostrich eggs are huge, yet, they are the smallest eggs relative to the size of the adult bird.

Prefix

kilo

10³

The prefix kilo- comes from the ancient Greek chilioi meaning thousand. The associated multiplicative factor is 1000 or 10³.

SI Mass Units

nanogram	ng	0.000000001
microgram	µg	0.000001
milligram	mg	0.001
gram	g	1
kilogram	kg	1000
megagram	Mg	1000000

The International System of Units

The General Conference on Weights and Measures (Conférence générale des poids et mesures) is tasked with overseeing the SI.