Writing measurements in kilogram and gram Kilograms (kg) and grams (g) are both units of mass, so they are related. 1 kilogram is equal to 1,000 grams.

But the kilogram isn’t the first of the seven base metric units to switch from a physical measure to a mathematical constant.

Of course, because the IPK is the definition of the kilogram, it can’t technically lose or gain weight.

The official definition of a kilogram has been changing for well over a century, but this week it may be redefined for the final time. After years of debate and discussion, scientists from around ...

Last week's vote to redefine the kilogram is the result of a process of steadily improving measurement that traces back for thousands of years.

John Pratt of US's National Institute of Standards and Technology seeking to revise how weight is recorded as metal impurities render current approach too variable and imprecise ...

Metrology, the branch of science dedicated to measurement, has created better and better systems of measurement for the kilogram based on fundamental principles rather than arbitrary chunks of ...