Kilogram - Wikipedia
The kilogram (also spelled kilogramme[1]) is the base unit of mass in the International System of Units (SI), equal to one thousand grams. It has the unit symbol kg. [1] The word "kilogram" is formed from …
Kilogram | mass, weight, SI unit | Britannica
Dec 24, 2025 · A kilogram is very nearly equal (it was originally intended to be exactly equal) to the mass of 1,000 cubic cm of water. The pound is defined as equal to 0.45359237 kg, exactly. As …
Kilogram - Kilogram Definition and Conversions of Kilogram
Kilogram is commonly referred to as 'kilo' and represented as 'kg'. Mass and weight are different quantities of measurement. While mass is measured in 'kg', weight is measured in 'Newton'. …
Kilogram: Introduction | NIST
May 14, 2018 · For more than a century, the kilogram (kg) — the fundamental unit of mass in the International System of Units (SI) — was defined as exactly equal to the mass of a small polished …
- kilogram - BIPM
The kilogram, symbol kg, is the SI unit of mass. It is defined by taking the fixed numerical value of the Planck constant h to be 6.626 070 15 x 10 –34 when expressed in the unit J s, which is equal to kg …
kilogram – Metric System
In science and technology, weight is a force, for which the SI unit is the newton; in commerce and everyday use, weight is usually a synonym for mass, for which the SI unit is the kilogram.
Kilogram - Simple English Wikipedia, the free encyclopedia
The kilogram[b] is the base unit of mass in the International System of Units (SI). It is widely used in science, engineering, and commerce worldwide. The kilogram is close to the mass of one litre of water.