Quintal
Symbol: qFrance, Germany, Russia, India, Latin America
What is a Quintal (q)?
Formal Definition
The metric quintal (symbol: q) is a unit of mass equal to 100 kilograms (approximately 220.462 pounds). It is not an official SI unit but is recognized by the International Bureau of Weights and Measures (BIPM) as a unit accepted for use with the SI. The metric quintal equals one deciton (0.1 metric tonnes) or 100,000 grams.
The quintal should be distinguished from the historical quintal (or centner), which varied significantly by country. The Spanish quintal was approximately 46 kg, the Portuguese quintal approximately 58.75 kg, and the German Zentner approximately 50 kg. The metric quintal of 100 kg was adopted during metrication to standardize these diverse traditional units. In some contexts, the metric quintal is also called the "metric centner" (metrichesky tsentner in Russian).
Practical Usage
The quintal is primarily used in agriculture for measuring crop yields, livestock weight, and commodity trading. Agricultural statistics in many countries report production in quintals per hectare (q/ha). The unit provides a convenient intermediate scale between the kilogram and the metric tonne — large enough to express agricultural quantities without extremely large numbers, yet small enough for meaningful precision in production reporting.
Etymology
Arabic and Latin Roots
The word "quintal" derives from the Medieval Latin "quintale" or "centenarium," which in turn comes from the Arabic "qintar" (قنطار), itself derived from the Latin "centenarius" (containing a hundred). The Arabic qintar was a large unit of weight used in Mediterranean trade, though its exact value varied by region and period.
The connection to the Latin "centum" (hundred) is reflected in the related term "centner" (German: Zentner), which has the same root. Both words indicate a unit based on "a hundred" of a smaller base unit — though historically, the hundred in question varied (100 pounds, 100 rotls, or other base units depending on the local system).
Evolution Across Languages
In French, the unit is "quintal" (plural: quintaux). In Spanish, it is "quintal." In Portuguese, "quintal." In German, the equivalent is "Zentner" (from centenarius). In Russian, the equivalent is "центнер" (tsentner). The metric quintal unified these diverse traditional terms by fixing the value at exactly 100 kilograms.
Precise Definition
Metric Quintal
The metric quintal is defined as exactly 100 kilograms. This is an exact definition with no uncertainty. Key equivalences: 1 q = 100 kg = 0.1 t (metric tonnes) = 100,000 g = 220.462 lb.
BIPM Recognition
The metric quintal is listed by the BIPM as a non-SI unit accepted for use with the SI system, primarily for agricultural and commercial applications. The BIPM notes that the quintal's use should be limited to contexts where it is traditionally established and should not replace the standard SI units (kilogram and tonne) in scientific work.
Comparison with Historical Quintals
Historical quintals varied enormously: the Castilian quintal was approximately 46 kg (100 Castilian pounds), the Portuguese quintal was approximately 58.75 kg, the German Zentner was 50 kg (100 German Pfund), and the Russian pood (related but distinct) was approximately 16.38 kg. The metric quintal of 100 kg was deliberately chosen as a round number in the metric system to replace these diverse standards.
History
Ancient and Medieval Origins
The concept of a "hundred-weight" unit exists in virtually every historical measurement system. The Arabic qintar, used across the Islamic world from the 7th century onward, was a major trade weight roughly corresponding to 100 rotls (the exact value varied by city and period). The term entered European languages through Mediterranean trade, particularly through the commercial centers of Italy, Spain, and Portugal.
In medieval Europe, the quintal took different values in different countries, always based on local definitions of the pound and the hundredweight. The Castilian quintal of 4 arrobas (about 46 kg) was used in Spanish trade and was exported to the Americas during colonization. The Portuguese quintal of 4 arrobas (about 58.75 kg, using the heavier Portuguese arroba) accompanied Portuguese trade to Brazil, Africa, and Asia.
Metrication
When the metric system was introduced in France in the 1790s, a new metric quintal was defined as 100 kilograms, replacing the diverse traditional quintals. This round-number definition — exactly 100 of the base unit — made the metric quintal easy to adopt and convert. Other European countries adopted the metric quintal as they metricated: Germany replaced the Zentner of 50 kg with a metric Zentner of 50 kg or the quintal of 100 kg (both are used); Russia adopted the tsentner (центнер) of 100 kg, replacing the pood.
Agricultural Standardization
The quintal became particularly important in agriculture, where crop yields and commodity quantities fall naturally in the range of tens to thousands of kilograms. Expressing wheat yield as "35 quintals per hectare" is more convenient than "3,500 kilograms per hectare" or "3.5 tonnes per hectare." International agricultural organizations, including the FAO, have historically used quintals in their statistical databases, though the trend is toward using metric tonnes.
Modern Status
Today, the metric quintal remains in active use in agriculture across Europe, Russia, India, and Latin America. It is gradually being replaced by the metric tonne in some contexts but shows no sign of disappearing from agricultural statistics and commodity markets.
Current Use
Agriculture
The quintal's primary domain is agriculture. Crop yields are widely reported in quintals per hectare (q/ha) in Europe, Russia, India, and Latin America. A good wheat yield might be 40-70 q/ha, a corn yield 60-100 q/ha, and a rice yield 30-60 q/ha. These figures are used by agricultural ministries, commodity analysts, and farmers throughout the developing world.
India
In India, the quintal is one of the most commonly used units for agricultural commodities. Grain, sugar, cotton, and other agricultural products are traded by the quintal on commodity exchanges and in wholesale markets (mandis). Indian agricultural statistics report production in quintals or lakh quintals (100,000 quintals). The minimum support prices (MSP) set by the Indian government for major crops are quoted per quintal.
Russia and CIS Countries
In Russia and other former Soviet countries, the tsentner (центнер, 100 kg) is widely used in agriculture. Soviet-era agricultural statistics used tsentners per hectare as the standard yield measurement, and this convention persists in modern Russian agriculture. Livestock weights and crop production data continue to be reported in tsentners.
European Agriculture
In France, Germany, Italy, Spain, and other European countries, the quintal appears in agricultural contexts. French grain yields are sometimes expressed in quintaux per hectare. German agriculture uses both the Zentner (50 kg) and the Doppelzentner (100 kg, equivalent to the quintal). The European Union's agricultural statistics use metric tonnes, but national statistics in some member states still reference quintals.
Declining in International Use
The FAO and other international organizations have been transitioning from quintals to metric tonnes in their statistical databases. The quintal is slowly being replaced by the tonne in international commodity trading, scientific publications, and standardized reporting. However, its persistence in domestic agriculture across dozens of countries ensures that it will remain in use for years to come.
Everyday Use
Farming Communities
In farming communities across India, Russia, and parts of Europe, the quintal is an everyday unit. Indian farmers discuss their harvest in quintals — "my field yielded 40 quintals of wheat" — and buy inputs (fertilizer, seed) in quintal-based quantities. Russian farmers similarly think in tsentners when estimating yields and planning storage.
Commodity Markets
Anyone trading agricultural commodities in India encounters the quintal daily. Market prices for rice, wheat, sugar, cotton, and other commodities are quoted per quintal on the National Commodity and Derivatives Exchange (NCDEX) and in wholesale markets. An Indian consumer following food prices in the news regularly encounters quintal-based price quotations.
Less Common in Urban Life
In urban settings outside agriculture, the quintal is less commonly encountered. City dwellers in most countries think in kilograms for personal purchases and may use the quintal only when buying bulk quantities of goods — such as a quintal bag of rice or sugar from a wholesale market.
Historical Use in Daily Commerce
Historically, the quintal was a standard commercial unit. In 19th and early 20th century Europe, bulk goods — coal, grain, metal, building materials — were routinely traded by the quintal. This usage has largely given way to the metric tonne for industrial quantities, but the quintal persists in agriculture where the 100 kg scale matches practical needs.
In Science & Industry
Agricultural Science
In agricultural science, the quintal per hectare (q/ha) is a standard unit for reporting crop yields in many countries. Research papers from Indian, Russian, and European agricultural institutions commonly use quintals. Field trial results, variety comparisons, and fertilizer response curves may be expressed in q/ha.
Food Science
In food science and food processing, especially in countries where the quintal is traditional, raw material quantities may be specified in quintals. Sugar mills, grain mills, and food processing plants in India report daily processing volumes in quintals.
Limited in Other Sciences
Outside agricultural and food science, the quintal is not used. Physics, chemistry, engineering, and other disciplines use kilograms and metric tonnes exclusively. The BIPM explicitly recommends limiting quintal usage to traditional agricultural and commercial contexts.
Statistical Databases
National statistical agencies in India (the Directorate of Economics and Statistics), Russia (Rosstat), and several European countries maintain agricultural databases using quintals. Researchers accessing these databases must understand the quintal to properly interpret and convert the data.
Interesting Facts
The metric quintal of 100 kg was designed to replace dozens of different traditional 'quintals' across Europe and the Americas, which ranged from about 46 kg (Castilian quintal) to about 58.75 kg (Portuguese quintal).
In India, the quintal is one of the most important commercial units. Government minimum support prices for crops like wheat and rice are quoted per quintal, affecting the livelihoods of hundreds of millions of farmers.
The German word 'Zentner' and the Russian word 'центнер' (tsentner) both mean the same as quintal (100 kg), all deriving from the Latin 'centenarius' (containing a hundred).
A standard bag of cement in many countries weighs 50 kg — exactly half a quintal. Bulk cement purchases at construction sites are often calculated in quintals.
The Arabic 'qintar' (قنطار), ancestor of the word 'quintal,' was one of the most important trade weights in the medieval Mediterranean, used by Arab, Jewish, and Christian merchants alike.
In French wine production, grape yields per hectare are often expressed in hectoliters (volume), but the weight of grapes is given in quintaux. Appellation rules may limit yields to 40-60 quintaux per hectare.
The FAO estimated global cereal production for 2023 at approximately 28.1 billion quintals (2.81 billion metric tonnes), illustrating the massive scale of world agriculture.
Soviet collective farms (kolkhozes) reported crop yields in tsentners per hectare. A 'record harvest' announcement might celebrate achieving 50 tsentners per hectare of wheat.
Regional Variations
India
In India, the quintal (100 kg) is the dominant unit for agricultural commodities. It is used on commodity exchanges, in government price support announcements, and in wholesale markets throughout the country. Indian agricultural statistics are reported in quintals. The unit is so embedded in Indian commerce that it will likely persist for decades even as international standards shift to metric tonnes.
Russia and CIS
In Russia, the tsentner (центнер, 100 kg) is the standard agricultural unit, inherited from Soviet-era practice. Agricultural yields, livestock weights, and crop production data are routinely reported in tsentners. The same applies in Ukraine, Belarus, Kazakhstan, and other former Soviet states.
France
In France, the quintal (quintal métrique, 100 kg) is used in agriculture and wine production. Grape yields for appellation wines are often specified in quintaux per hectare. French agricultural statistics use both quintals and metric tonnes.
Germany
Germany has two related units: the Zentner (50 kg) and the Doppelzentner (100 kg, equivalent to the quintal). The Zentner remains common in everyday speech (ordering 'einen Zentner Kartoffeln' — a Zentner of potatoes), while official agricultural statistics use the Doppelzentner or metric tonnes.
Latin America
In many Latin American countries, the quintal (often written 'qq') remains in use for agricultural commodities, especially coffee. The Central American quintal is 100 pounds (approximately 46 kg), not 100 kilograms — a critical distinction. Colombian and Brazilian coffee is often traded by the 60 kg bag, not by the quintal.