Kilogram(kg) is the base unit of mass in the International System of Units (SI) and it was originally defined as the mass of one liter of water.

While a gram(g) is a metric unit of mass and was formally defined as the absolute weight of a volume of pure water equal to the cube of the hundredth part of a meter, and at the temperature of melting ice.

In the metric system, grams are used to measure light weights and kilograms are used to measure heavier weights.

**Formula to convert grams to kilograms.**

Since we know that 1000 g are equivalent to 1 kg, we can therefore say that to convert g to kg we divide the g by 1000.

**Mass in kg = Mass in g ** **÷ 1000**

**Example:**

Convert 55000g to kg.

**= 55,000 ÷ 1000**

**= 55kg**