Definition
Kilogram
A kilogram is the SI base unit of mass and equals exactly 1000 grams.
What it means
Use kilograms for the mass of objects that are heavier than the small amounts usually measured in grams. You can switch between the two by grouping or ungrouping thousands of grams.
Remember it
One kilogram is a bundle of 1000 grams.
Example
A parcel has 2 kg and 300 g of mass. In grams, that is 2000 g + 300 g = 2300 g.
Watch for
Kilogram names mass; it is not a shortened form of kilometre.
Common mix-up
The symbol is kg, with both letters lowercase.
Exact meaning
The kilogram (kg) is the SI base unit of mass. One kilogram equals exactly 1000 grams.