Kilogram

kilogram
CGKilogram.jpg
A computer image of the International Prototype Kilogram. It is the kilogram. It sits next to an inch-based ruler for scale. Like the other prototypes, the edges of the IPK have a four-angle chamfer to minimize wear (although only three can be seen in this image).
Standard:SI base unit
Quantity:Mass
Symbol:kg
Expressed in:1 kg =
Natural units5.609×1029 MeV/c2
Imperial units2.20462262 lbs

The kilogram or kilogramme[Note 1] is a metric unit of mass. The official kilogram is the mass of one piece of platinum-iridium metal kept in Paris. The piece of metal is known as Prototype Kilogram[1] (IPK).[Note 2] It is now the only metric unit which is defined as an object.[2] The kilogram will be defined by Planck's Constant starting on 20 May 2019.

There are attempts to define the kilogram in other ways. One example specifies a number of atoms of a certain substance (at a certain temperature).

One kilogram is a little more than 2.2 pounds. One tonne is one thousand kilograms. One litre of water weighs almost exactly one kilogram, at 3.98° centigrade, at sea level. This was the basis of the definition of the gram in 1795.

History

In 1879, the piece of metal was made. It was officially chosen to be the kilogram in 1889. It was made of 90% platinum and 10% iridium.[3] Those metals were chosen because they do not rust or corrode like most metals. It is stored in a vault at the BIPM in Sèvres, France. From 1795 to 1799, the unit of mass was not called "kilogram" but was called "grave".

The original kilogram is kept inside bell jars. Over time, dust can collect on it. Before it is measured, it is cleaned to get the original size.[3]

Other Languages
Afrikaans: Kilogram
Alemannisch: Kilogramm
Аҧсшәа: Акилограмм
العربية: كيلوغرام
aragonés: Kilogramo
অসমীয়া: কিলোগ্ৰাম
asturianu: Quilogramu
Avañe'ẽ: Kilogarámo
Aymar aru: Kilu
azərbaycanca: Kiloqram
Bân-lâm-gú: Kong-kin
башҡортса: Килограмм
беларуская: Кілаграм
беларуская (тарашкевіца)‎: Кіляграм
भोजपुरी: किलोग्राम
български: Килограм
བོད་ཡིག: སྟོང་ཁེའུ།
bosanski: Kilogram
brezhoneg: Kilogramm
català: Quilogram
Чӑвашла: Килограмм
čeština: Kilogram
Cymraeg: Cilogram
dansk: Kilogram
Deutsch: Kilogramm
eesti: Kilogramm
Ελληνικά: Χιλιόγραμμο
English: Kilogram
español: Kilogramo
Esperanto: Kilogramo
euskara: Kilogramo
فارسی: کیلوگرم
français: Kilogramme
Frysk: Kilogram
furlan: Chilogram
Gaeilge: Cileagram
galego: Quilogramo
贛語: 公斤
客家語/Hak-kâ-ngî: Kûng-kîn
한국어: 킬로그램
հայերեն: Կիլոգրամ
हिन्दी: किलोग्राम
hrvatski: Kilogram
Bahasa Indonesia: Kilogram
interlingua: Kilogramma
íslenska: Kílógramm
italiano: Chilogrammo
עברית: קילוגרם
Basa Jawa: Kilogram
къарачай-малкъар: Килограмм
ქართული: კილოგრამი
қазақша: Килограмм
Kiswahili: Kilogramu
Kreyòl ayisyen: Kilogram
kurdî: Kîlogram
Кыргызча: Килограмм
Latina: Chiliogramma
latviešu: Kilograms
Lëtzebuergesch: Kilogramm
lietuvių: Kilogramas
Limburgs: Kilogram
lingála: Kilogálame
lumbaart: Chilogram
magyar: Kilogramm
македонски: Килограм
മലയാളം: കിലോഗ്രാം
Malti: Kilogramm
Bahasa Melayu: Kilogram
Mìng-dĕ̤ng-ngṳ̄: Gŭng-gṳ̆ng
монгол: Килограмм
မြန်မာဘာသာ: ကီလိုဂရမ်
Nederlands: Kilogram
नेपाली: किलोग्राम
नेपाल भाषा: किलोग्राम
日本語: キログラム
Nordfriisk: Kilogram
norsk: Kilogram
norsk nynorsk: Kilogram
occitan: Quilograma
oʻzbekcha/ўзбекча: Kilogramm
ਪੰਜਾਬੀ: ਕਿਲੋਗ੍ਰਾਮ
پنجابی: کلوگرام
Patois: Kilogram
Plattdüütsch: Kilogramm
polski: Kilogram
português: Quilograma
română: Kilogram
Runa Simi: Kilugramu
русиньскый: Килограм
русский: Килограмм
Gagana Samoa: Kilokalama
संस्कृतम्: किलोग्राम्
Scots: Kilogramme
shqip: Kilogrami
sicilianu: Chilugrammu
slovenčina: Kilogram
slovenščina: Kilogram
ślůnski: Kilogram
Soomaaliga: Kiilogaraam
کوردی: کیلۆگرام
српски / srpski: Килограм
srpskohrvatski / српскохрватски: Kilogram
Basa Sunda: Kilogram
suomi: Kilogramma
svenska: Kilogram
Tagalog: Kilogramo
తెలుగు: కిలోగ్రాము
Türkçe: Kilogram
українська: Кілограм
اردو: کلوگرام
vèneto: Chiłogramo
Tiếng Việt: Kilôgam
文言: 公斤
Winaray: Kilogramo
吴语: 公斤
ייִדיש: קילאגראם
粵語: 千克
žemaitėška: Kėluograms
中文: 千克