Dalton (unit)
The dalton or unified atomic mass unit (symbols: Da or u) is a non-SI unit of mass widely used in physics and chemistry. It is defined as 1⁄12 of the mass of an unbound neutral atom of carbon-12 in it
Kantar
A kantar is the official Egyptian weight unit for measuring cotton. It corresponds to the US hundredweight, and is roughly equal to 99.05 pounds, or 45.02 kilograms. It is equal to either 157 kilogram
Esterlin
The esterlin is an obsolete netherlandic unit of mass and stands for gram. It also was a unit of mass for gold in France weighting 28 ½ Grain.The place of the unit in the netherlandic unit-chain was
Zolotnik
A zolotnik (in Russian: золотни́к; abbr.: zol.) was a small Russian unit of weight, equal to 0.1505 avoirdupois ounces, or 4.2658 grams (about 65.83 grains). Used from the 10th to 20th centuries, its
Earth mass
An Earth mass (denoted as or , where ⊕ is the standard astronomical symbol for Earth), is a unit of mass equal to the mass of the planet Earth. The current best estimate for the mass of Earth is M⊕ =
Tonne
The tonne (/tʌn/ or /tɒn/; symbol: t) is a unit of mass equal to 1000 kilograms. It is a non-SI unit accepted for use with SI. It is also referred to as a metric ton to distinguish it from the non-met
Buddam (unit)
A buddam (also known as a chow) is an obsolete unit of mass used in the pearl trade in Mumbai (formerly Bombay) in the 19th century. A buddam equalled 1/1600 chow, or 1/16 docra.
Stick (unit)
The stick may refer to several separate units, depending on the item being measured.
Dharni (unit)
The dharni (Nepali: धार्नि, romanized: dhārni) is a still used ancient unit of mass, used in Nepal, of about 2+1⁄2 seer. It was divided into 2 (बिसौलि), 4 (बोड़ि), or 12 pāu (पाउ). The United Nations
Mace (unit)
A mace (Chinese: 錢; pinyin: qián; Hong Kong English usage: tsin; Southeast Asian English usage: chee) is a traditional Chinese measurement of weight in East Asia that was also used as a currency denom
Zentner
The zentner (German Zentner, from Latin centenarius, derived from centum meaning "hundred") is a name for a unit of mass which was used predominantly in Germany, Austria, and Switzerland, although it
Mark (unit)
The Mark (from Middle High German: Marc, march, brand) is originally a medieval weight or mass unit, which supplanted the pound weight as a precious metals and coinage weight from the 11th century. Th
Passeree
A passeree is an obsolete unit of mass used in Bengal that approximately equalled 4.677 kg (10.3 lb). Five seers made up one passeree. After metrication in the mid-20th century, the unit became obsole
Sarpler
Sarpler, Sarplier or (in Scotland) Serplathe was a UK weight for wool.
Carat (mass)
The carat (ct) is a unit of mass equal to 200 mg (0.00705 oz) or 0.00643 troy oz, and is used for measuring gemstones and pearls.The current definition, sometimes known as the metric carat, was adopte
Long ton
The long ton, also known as the imperial ton or displacement ton, is the name for the unit called the "ton" in the avoirdupois system of weights or Imperial system of measurements. It was standardised
Thai baht
The baht (/bɑːt/; Thai: บาท, pronounced [bàːt]; sign: ฿; code: THB) is the official currency of Thailand. It is divided into 100 satang (สตางค์, pronounced [sà.tāːŋ]). The issuance of currency is the
Zollpfund
The Zollpfund ("customs pound") is an historical German weight based on the old pound. In 1854, the German Customs Union, the Zollverein, fixed the pound weight or at exactly 500 grammes, making it ab
Grave (unit)
The grave, abbreviated gv, is the unit of mass used in the first metric system which was implemented in France in 1793. In 1795, the grave was renamed as the kilogram.
Carolingian monetary system
The Carolingian monetary system, also called the Carolingian coinage system or just the Carolingian system, was a currency structure introduced by Charlemagne in the late 8th century as part of a majo
Proof mass
A proof mass or test mass is a known quantity of mass used in a measuring instrument as a reference for the measurement of an unknown quantity. A mass used to calibrate a weighing scale is sometimes c
Micropound
The micropound (abbreviation μlb) is a small unit of avoirdupois weight and mass in the US and imperial systems of measurement, equal to one-millionth (1/1,000,000) pound. It is equal to exactly 453.5
Troy weight
Troy weight is a system of units of mass that originated in 15th-century England, and is primarily used in the precious metals industry. The troy weight units are the grain, the pennyweight (24 grains
Mithqal
Mithqāl (Arabic: مثقال) is a unit of mass equal to 4.25 grams (0.137 ozt) which is mostly used for measuring precious metals, such as gold, and other commodities, like saffron. The name was also appli
Mina (unit)
The mina (also mĕnē, Aramaic; Hebrew: מָנֶה) is an ancient Near Eastern unit of weight, which was divided into 60 shekels. The mina, like the shekel, was also a unit of currency.
Carolingian pound
The Carolingian pound (Latin: pondus Caroli, German: Karlspfund), also called Charlemagne's pound or the Charlemagne pound, was a unit of weight that emerged during the reign of Charlemagne. It served
Cullingey
A cullingey is an obsolete unit of mass that was used in the southern region in state of Karnataka in India. One cullingey was approximately equal to 81.25 troy grains (5.265 g). After metrification i
Wey (unit)
The wey or weight (Old English: ƿæᵹe, waege, lit. "weight") was an English unit of weight and dry volume by at least 900 AD, when it begins to be mentioned in surviving legal codes.
Kendrick mass
The Kendrick mass is defined by setting the mass of a chosen molecular fragment, typically CH2, to an integer value in amu (atomic mass units). It is different from the IUPAC definition, which is base
Picul
A picul /ˈpɪkəl/or tam is a traditional Asian unit of weight, defined as "as much as a man can carry on a shoulder-pole".
Talent (measurement)
The talent was a unit of weight that was introduced in Mesopotamia at the end of the 4th millennium BC, and was normalized at the end of the 3rd millennium during the Akkadian-Sumer phase, divided int
Grivna
Grivna (гривна) was a currency as well as a measure of weight used in Kievan Rus' and other East Slavic countries since the 11th century.
Dutch cask
Dutch cask is a UK unit of weight for butter and cheese.
Microgram
In the metric system, a microgram or microgramme is a unit of mass equal to one millionth (1×10−6) of a gram. The unit symbol is μg according to the International System of Units (SI); the recommended
Alternative approaches to redefining the kilogram
The scientific community examined several approaches to redefining the kilogram before deciding on a redefinition of the SI base units in November 2018. Each approach had advantages and disadvantages.
Arrátel
The arrátel (Portuguese pronunciation: [ɐˈʁatɛɫ]) was the base unit of weight in the Portuguese customary measurement system. Until the adoption of the metric system in the 19th century, the arrátel w
Abucco
In Pegu, Burma, the abucco (plural abucci or abuccos) was a unit of mass used for gold and silver. It was approximately 196.44 grams or 6.316 troy ounces. Other units of mass were:
* 1 biza = 4 agiro
Jupiter mass
Jupiter mass, also called Jovian mass, is the unit of mass equal to the total mass of the planet Jupiter. This value may refer to the mass of the planet alone, or the mass of the entire Jovian system
Maund
The maund (/ˈmɔːnd/), mun or mann (Bengali: মন; Urdu: من) is the anglicized name for a traditional unit of mass used in British India, and also in Afghanistan, Persia, and Arabia: the same unit in the
Quintal
The quintal or centner is a historical unit of mass in many countries which is usually defined as 100 base units, such as pounds or kilograms. It is a traditional unit of weight in France, Portugal, a
Garce
A garce is an obsolete unit of measurement. In India, a garce was a unit of dry volume approximately equal to 5,244 litres (149 US bushels). In Sri Lanka, it was approximately 5,084.8 litres (144.2944
Cavan (unit)
Cavan, sometimes spelled Caban or Kaban) is Filipino unit of mass and also a unit of volume or dry measure.
Tomin
The tomín (plural tomines, abbreviated t) is an antiquated Spanish unit of weight and currency. It was equivalent to one-eighth of a peso, both in currency and weight, and derived from the Arabic term
Apothecaries' system
The apothecaries' system, or apothecaries' weights and measures, is a historical system of mass and volume units that were used by physicians and apothecaries for medical prescriptions and also someti
Pound (mass)
The pound or pound-mass is a unit of mass used in British imperial and United States customary systems of measurement. Various definitions have been used; the most common today is the international av
Schilling (unit)
As well as being the name of a coin, the Schilling was an historical unit in three areas of measurement: numbers, volume and weight. It can be regarded as a European measure, because it was used in Bo
Dram (unit)
The dram (alternative British spelling drachm; apothecary symbol ʒ or ℨ; abbreviated dr) is a unit of mass in the avoirdupois system, and both a unit of mass and a unit of volume in the apothecaries'
Pood
Pood (Russian: пуд, tr. pud, IPA: [put], plural: pudi or pudy) is a unit of mass equal to 40 funt (фунт, Russian pound). Since 1899 it is set to approximately 16.38 kilograms (36.11 pounds). It was us
Catty
The catty, kati or 斤, pronounced as jin in Mandarin and gan in Cantonese, is a traditional Chinese unit of mass used across East and Southeast Asia, notably for weighing food and other groceries in so
Truss (unit)
A truss is a tight bundle of hay or straw. It would usually be cuboid, for storage or shipping, and would either be harvested into such bundles or cut from a large rick.
Arroba
Arroba is a Portuguese and Spanish custom unit of weight, mass or volume. Its symbol is @.
Gram
The gram (originally gramme; SI unit symbol g) is a unit of mass in the International System of Units (SI) equal to one one thousandth of a kilogram. Originally defined as of 1795 as "the absolute wei
Fotmal
The fotmal (Old English: fotmael, lit. "foot-measure"; Latin: fotmal), also known as the foot (pes), formel, fontinel, and fotmell, was an English unit of variable weight particularly used in measurin
Avoirdupois system
The avoirdupois system (/ˌævərdəˈpɔɪz, ˌævwɑːrdjuːˈpwɑː/; abbreviated avdp.) is a measurement system of weights that uses pounds and ounces as units. It was first commonly used in the 13th century AD
Batman (unit)
The batman (Turkish pronunciation: [batˈman]) was a unit of mass used in the Ottoman Empire and among Turkic peoples of the Russian Empire. It has also been recorded as a unit of area in Uyghur-speaki
Kip (unit)
A kip is a US customary unit of force. It equals 1000 pounds-force, and is used primarily by structural engineers to indicate forces where the value represented in pound-force is inefficient. Although
Skojec
Skojec was a medieval central European unit of account as well as a unit of mass. It was also used as a unit of currency. 1 skojec was equal to 1/24 of a grzywna. 1 skojec = 30 pfennigs1 wiardunek = 6
Bahar (unit)
Bahar (Arabic: بـهـﺭ) is an obsolete unit of measurement.
* In Iran it was a unit of length approximately equal to 3.25 cm (1.28 in)
* In Oman, it was a unit of mass equal to approximately 808 g (1.
Pao (unit)
The pao is a unit of dry measure (mass) which is used in South Asia. The name may come from the Punjabi ਪਾਓ páo, which was a traditional charge of one quarter of a seer per every maund of grain that w
Keel (unit)
Keel was a unit used to measure coal in the northeast of England, being the quantity of coal carried by a keelboat on the Tyne and Wear rivers. In 1750 it was said to be equal to 8 Newcastle chaldrons
Lot (weight)
The Lot (formerly also written Loth) was a unit of measurement of mass, which was mainly used in German-speaking states of the Holy Roman Empire and in Scandinavia. It was replaced in the German Reich
Hundredweight
The hundredweight (abbreviation: cwt), formerly also known as the centum weight or quintal, is a British imperial and US customary unit of weight or mass. Its value differs between the US and British
Frasilah
A frasilah is a historical weight unit that was used in the 19th century on the island of Zanzibar and in eastern Africa. A frasilah is equivalent to about 35 pounds (16 kg). This weight unit was used
Corgee
A corgee is an obsolete unit of mass equal to 212 moodahs, or rush mat bundles of rice. The unit was used in the Canara (now Kanara) region of Karnataka in India.
Dirham
The dirham, dirhem or dirhm (Arabic: درهم) is a silver unit of currency historically and currently used by several Arab and Arab influenced states. The term has also been used as a related unit of mas
Cash (unit)
Cash or li (simplified Chinese: 厘; traditional Chinese: 釐 or 厘; pinyin: lí) is a traditional Chinese unit of weight. The terms "cash" or "le" were documented to have been used by British explorers in
Munjandie
A munjandie is an obsolete unit of mass in India approximately equal to 4 grains (0.259 g). After metrication in the mid-20th century, the unit became obsolete.
Våg
A våg (plural våger) or vog is an old Scandinavian unit of mass. The standardized landsvåg, which was introduced in Norway with the new system of weights and measures in 1875, corresponded to three ,
Ship load
Ship load is a United Kingdom unit of weight for coal equal to 20 keels or 949,760 pounds (430,800 kg).
Candy (unit)
The candy or candee (Marathi: खंडी, khaṇḍī; Tamil: கண்டி, kaṇṭi; Malayalam: കണ്ഡി, kaṇḍi, കണ്ടി, kaṇṭi), also known as the maunee, was a traditional South Asian unit of mass, equal to 20 maunds and ro
Ounce
The ounce (/ˈaʊns/) is any of several different units of mass, weight or volume and is derived almost unchanged from the uncia, an Ancient Roman unit of measurement. The (exactly 28.349523125 g) is 1⁄
Short ton
The short ton (symbol tn) is a measurement unit equal to 2,000 pounds (907.18 kg). It is commonly used in the United States, where it is known simply as a ton, although the term is ambiguous, the sing
Flask (unit)
Flask is a British unit of mass or weight in the avoirdupois system, used to measure mercury. It is defined as 76 pounds (34 kg). Near room temperature, a flask of mercury occupies a volume of approxi
Kile (unit)
The kile (Ottoman Turkish: كيله) was an Ottoman unit of volume similar to a bushel, like other dry measures also often defined as a specific weight of a particular commodity. Its value varied widely b
Ratti
Ratti (Sanskrit: raktika) is a traditional Indian unit of measurement for mass. Based on the nominal weight of a Gunja seed (Abrus precatorius), it measured approximately 1.8 or 1.75 grains or 0.11339
Myriagram
The myriagram (French: myriagramme) is a former French and metric unit of mass equal to 10,000 grams (myriad being the Greek word for ten thousand). Although never as widely used as the kilogram, the
Grain (unit)
A grain is a unit of measurement of mass, and in the troy weight, avoirdupois, and apothecaries' systems, equal to exactly 64.79891 milligrams. It is nominally based upon the mass of a single ideal se
Ton
Ton is the name of any one of several units of measure. It has a long history and has acquired several meanings and uses. Mainly it describes units of weight. Confusion can arise because ton can mean
Sack (unit)
The sack (abbreviation: sck.) was an English unit of weight or mass used for coal and wool. It has also been used for other commodities by weight, commodities by volume, and for both weight and volume
Seam (unit)
A seam is an obsolete unit of volume or mass in the United Kingdom The Oxford English Dictionary includes definitions of a seam as:
* 6–8 imperial pecks (55–73 L) of sand
* 9 imperial pecks (82 L) o
Masha (unit)
A masha is a traditional Indian unit of mass, now standardized as 0.972 grams (0.0343 oz). Grain is usually taken is rice 8 grains of rice = 1 Ratti 8 Ratti = 1 Masha 12 Masha = 1 Tola 5 Tola = 1 16 =
Nail (unit)
A nail, as a unit of cloth measurement, is generally a sixteenth of a yard or 21⁄4 inches (5.715 cm). The nail was apparently named after the practice of hammering brass nails into the counter at shop
Candareen
A candareen (/kændəˈriːn/; Chinese: 分; pinyin: fēn; Cantonese Yale: fàn; Singapore English usage: hoon) is a traditional measurement of weight in East Asia. It is equal to 10 cash and is 1⁄10 of a mac
Tical (unit)
The tical is a unit of mass (or weight in the colloquial sense) historically used in Mainland Southeast Asia, particularly in the predecessor states of Myanmar, where it is known as the kyat (kyattha)
Mene (unit)
The mĕnē (Aramaic: מְנֵא; Hebrew: מָנֶה), also mina, is an ancient Mesopotamian unit of weight for gold or silver and one of the earliest written words for money. The mĕnē, like the shekel, was also a
Stone (unit)
The stone or stone weight (abbreviation: st.) is an English and imperial unit of mass equal to 14 pounds (6.35 kg). The stone continues in customary use in the United Kingdom for body weight. England
Tola (unit)
The tola (Hindi: तोला; Urdu: تولا tolā) also transliterated as tolah or tole, is a traditional Ancient Indian and South Asian unit of mass, now standardised as 180 grains (11.6638038 grams) or exactly
Grzywna (unit)
The grzywna (Polish: [ˈɡʐɨvna]) was a measure of weight, mainly for silver, commonly used throughout medieval central and eastern Europe, particularly in the Kingdom of Poland and Kingdom of Bohemia (
Milli mass unit
The milli mass unit or (mmu) is used as a unit of mass by some scientific authors even though this unit is not defined by the IUPAP red book nor by the IUPAC green book. It is a short form of the more
Shekel
Shekel or sheqel (Akkadian: 𒅆𒅗𒇻 šiqlu or siqlu, Hebrew: שקל, plural Hebrew: שקלים sheqalim or shekels, Phoenician: 𐤔𐤒𐤋) is an ancient Mesopotamian coin, usually of silver. A shekel was first a unit o
Solar mass
The solar mass (M☉) is a standard unit of mass in astronomy, equal to approximately 2×1030 kg. It is often used to indicate the masses of other stars, as well as stellar clusters, nebulae, galaxies an
Esterling
The esterling is an obsolete Belgian unit of mass.
* 1 esterling = 1/20 ounce
Oka (mass)
The oka, okka, or oke (Ottoman Turkish: اوقه) was an Ottoman measure of mass, equal to 400 dirhems (Ottoman drams). Its value varied, but it was standardized in the late empire as 1.2829 kilograms. 'O
Hobbit (unit)
The hobbit (also hobbett, hobbet, or hobed, from Welsh: hobaid) is a unit of volume or weight formerly used in Wales for trade in grain and other staples. It was equal to two and a half bushels, but w
Tank (unit)
A tank is an obsolete unit of mass in India approximately equal to 4.4 g (69 gr). After metrication in the mid-20th century, the unit became obsolete. In Mumbai (formerly Bombay), the tank equalled 17
Slug (unit)
The slug is a derived unit of mass in a weight-based system of measures, most notably within the British Imperial measurement system and the United States customary measures system. Systems of measure
Romanian units of measurement
The measures of the old Romanian system varied greatly not only between the three Romanian states (Wallachia, Moldavia, Transylvania), but sometimes also inside the same country. The origin of some of
Kilogram
The kilogram (also kilogramme) is the unit of mass in the International System of Units (SI), having the unit symbol kg. It is a widely used measure in science, engineering and commerce worldwide, and
Kula (unit)
A kula is an obsolete unit of measurement.
* In India, it was a unit of land area. After metrication in the mid-20th century, the unit became obsolete.
* In Morocco, it was a unit of mass equal to 2
Pennyweight
A pennyweight (dwt) is a unit of mass equal to 24 grains, 1⁄20 of a troy ounce, 1⁄240 of a troy pound, approximately 0.054857 avoirdupois ounce and exactly 1.55517384 grams. It is abbreviated dwt, d s
Scrupulum
Scrupulum, meaning a tiny stone (from scrupus sharp stone), indicates a weight of 1⁄24 of a Roman ounce (i.e.) or, by extension, of other measures. Metaphorically, the stone is thought to be sharp and
Wiardunek
The Wiardunek (also referred to as wiardunk, czwartak or ferton; German: viertel, Latin: ferto) was a Mediaeval Central European unit of mass most widely used in Poland and Germany. Wiardunek was also
Adarme
The adarme is an antiquated Spanish unit of mass, equal to three tomines, equivalent to 1⁄16 ounce (1.8 grams). The term derives from the Arabic درهم, parallel with drachm and the Greek δραχμἠ and per
Seer (unit)
A Seer (also sihr) is a traditional unit of mass and volume used in large parts of Asia prior to the middle of the 20th century. It remains in use only in a few countries such as Afghanistan, Iran, an
Malay units of measurement
Units of measurement used in Malaysia and neighbouring countries include the kati, a unit of mass, and the gantang, a unit of volume.
International Prototype of the Kilogram
The International Prototype of the Kilogram (referred to by metrologists as the IPK or Le Grand K; sometimes called the ur-kilogram, or urkilogram, particularly by German-language authors writing in E
Tael
Tael (/ˈteɪl/), also known as the tahil and by , can refer to any one of several weight measures used in East Asia and Southeast Asia. It usually refers to the Chinese tael, a part of the Chinese syst
Adowlie
An adowlie (also adholee, adholy, adowly) is an obsolete unit of dry volume and mass formerly used in western India a standard measurement for grain and salt.
* As a dry measure for salt, it equalled
Tub (unit)
Tub was a unit of capacity or of weight used in Britain and elsewhere.