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Converting Grams to Kilograms

Worked Unit Conversion Example Problem


This example problem illustrates the method to convert grams to kilograms.


How many kilograms are in 250 marbles if each marble is 5 grams?


First, determine the total mass of the marbles.

mass of all marbles = number of marbles x mass of each marble
mass of all marbles = 250 marbles x 5 g/marble
mass of all marbles = 1250 grams

Second, convert grams to kilograms.

There are 1000 grams in 1 kilogram.
Set up the conversion so the desired unit will be cancelled out. In this case, we want kg to be the remaining unit.

mass of all marbles in kg = (mass of all marbles in g) x (1 kg/1000 g)

Note how the grams unit will be cancelled out in this equation.

mass of all marbles in kg = (1250)/1000
mass of all marbles in kg = 1.250 kg


There are 1.250 kg in 250 marbles.

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