The gram (g) is the base unit of mass in the metric system, defined as one-thousandth of a kilogram. It is the standard measurement for food portions, postal rates, and small objects in daily life across most of the world. One gram equals approximately 0.0353 ounces, and a standard paperclip weighs roughly one gram.

The kilogram (kg) is the base unit of mass in the International System of Units, defined by the Planck constant since 2019. It is the most widely used mass unit globally for body weight, grocery items, and shipping, appearing on scales in homes and markets everywhere. One kilogram equals roughly 2.2046 pounds.