Browse Definitions :
Definition

kilogram (kg)

The kilogram (abbreviation, kg) is the Standard International (SI) System of Units unit of mass. It is defined as the mass of a particular international prototype made of platinum-iridium and kept at the International Bureau of Weights and Measures. It was originally defined as the mass of one liter (10-3 cubic meter) of pure water.

At the Earth's surface, a mass of 1 kg weighs approximately 2.20 pounds (lb). Conversely, an object that weighs 1 lb at the Earth's surface has a mass of approximately 0.454 kg. There is a qualitative as well as a quantitative difference between kilograms and pounds. Kilograms denote mass, but pounds denote weight, the force a mass exerts against a barrier in the presence of an acceleration field acting perpendicular to the barrier. On the surface of Mars, where the gravitational acceleration is 37 percent of that on the surface of the Earth, a mass of 1 kg weighs 0.814 lb. In orbit, or in a vehicle coasting through space, the net acceleration is zero and a mass of 1 kg has no weight. In other words, it is weightless.

Mass is often specified in smaller units than the kilogram, by changing the power-of-10 prefix multiplier. A mass of one gram (1 g) is 10-3 kg. A mass of one milligram (1 mg) is 10-6 kg, or 10-3 g. A mass of one microgram (1 µg) is 10-9 kg, or 10-6 g. A mass of one nanogram (1 ng) is 10-12 kg, or 10-9 g.

Also see Standard International (SI) System of Units and prefix multipliers.

This was last updated in September 2005

Continue Reading About kilogram (kg)

Start the conversation

Send me notifications when other members comment.

Please create a username to comment.

-ADS BY GOOGLE

File Extensions and File Formats

Powered by:

SearchCompliance

  • regulatory compliance

    Regulatory compliance is an organization's adherence to laws, regulations, guidelines and specifications relevant to its business...

  • Whistleblower Protection Act

    The Whistleblower Protection Act of 1989 is a law that protects federal government employees in the United States from ...

  • smart contract

    A smart contract, also known as a cryptocontract, is a computer program that directly controls the transfer of digital currencies...

SearchSecurity

  • RSA algorithm (Rivest-Shamir-Adleman)

    The RSA algorithm is the basis of a cryptosystem -- a suite of cryptographic algorithms that are used for specific security ...

  • remote access

    Remote access is the ability to access a computer or a network remotely through a network connection.

  • IP Spoofing

    IP spoofing is the crafting of Internet Protocol (IP) packets with a source IP address that has been modified to impersonate ...

SearchHealthIT

SearchDisasterRecovery

  • virtual disaster recovery

    Virtual disaster recovery is a type of DR that typically involves replication and allows a user to fail over to virtualized ...

  • tabletop exercise (TTX)

    A tabletop exercise (TTX) is a disaster preparedness activity that takes participants through the process of dealing with a ...

  • risk mitigation

    Risk mitigation is a strategy to prepare for and lessen the effects of threats faced by a data center.

SearchStorage

  • enterprise storage

    Enterprise storage is a centralized repository for business information that provides common data management, protection and data...

  • disk array

    A disk array, also called a storage array, is a data storage system used for block-based storage, file-based storage or object ...

  • optical storage

    Optical storage is any storage type in which data is written and read with a laser. Typically, data is written to optical media, ...

Close