1g

1 g refers to one gram, a unit of mass in the metric system. The gram is widely used for everyday measurements and scientific contexts, and it is defined as one thousandth of a kilogram.

Definition and relation to SI. The gram equals 0.001 kilograms (10^-3 kg). In SI usage, the kilogram is the base unit of mass, and the gram is a derived unit accepted for use with SI. After the 2019 redefinition of the kilogram, 1 g remains exactly 0.001 kg by definition.

Conversions and equivalences. Common conversions include 1 g = 1,000 mg and 1 g = 0.001 kg. In customary units, 1 g is approximately 0.035274 ounces (avoirdupois) and about 0.00220462 pounds. Other relevant conversions are 1 kg = 1,000 g and 1 g = 1,000,000 micrograms (µg).

Uses and context. The gram is commonly used to measure small masses such as food ingredients, laboratory samples, medications, and consumer objects. Everyday examples include small coins and items like a standard paperclip or a typical dollar bill, which are on the order of a few grams.

Notes on terminology. The symbol for the unit is g, written in lowercase. In physics, the symbol g is also used for acceleration due to gravity, about 9.81 m/s^2 on Earth; in that context, “1 g” refers to acceleration rather than mass. When referring to mass, the intended meaning is usually clear from context as one gram.