Convert gram to kilogram

What is a gram?

During ancient times, our predecessors were constantly looking for some standards for mass determination. It was easy and practical to evaluate mass in comparison with some grains or seeds of plants. Then, they were replaced by coins made of different metals.

However, not all these options were precise and they also differed in counties and regions. These were the reasons for the development of a gram as a unified option in the 18th century. According to the definition, 1 g was equal to the mass of 1 cm3 of distilled water. The measurement must be made at 4 °C temperature and one atmosphere pressure.

Later, grams were replaced by kilograms as a new more convenient standard. For them, a special object was created for comparison and determination of mass. Still, grams were also left for measurements and nowadays 1 gm is considered as 1/1000 of a kg.

What is a kilogram?

A kilogram is a systematic unit for mass determination. It belongs to the basic options that are known and utilized worldwide and is equal to 1000 g.

To determine exactly what is 1 kg, scientists developed a special object in the XX century. It was a platinum and iridium cylinder with dimensions of 39 mm. It was set in France and copied for other countries to compare and determine masses.

Thus, until 2019, a kilogram was any subject with the same mass as this standard. However, it appeared that its value could change over time. Therefore, scientists decided to redefine kilograms and base a new definition on Planck's constant. This decision was realized in 2019.

Nowadays an old standard becomes a museum’s exhibit. Still, it changes basically nothing for ordinary users as the understanding of a kg and its relation to other units stays the same.