In Spain, ? – 19ᵗʰ centuries, a unit of mass, = 20 quintales = 2000 libras, about 920 kilograms. The tonelada métrica de peso is 10 quintales métricos = 1000 kilograms.


In Spain, a unit used to measure the tonnage of ships, originally 8 cubic codos de ribera (about 1.53 cubic meters). As a result of an international conference on tonnage held in Constantinople on 2 December 1874, the tonelada de arqueo = 2.83 cubic meters (which is 100 cubic feet). An order of 27 January 1879 introduced the term tonelada métrica de arqueo = 1 cubic meter or 1000 liters. Finally, a regulation of 25 September 1900 reconfirmed the tonelada de arqueo = 2.83 cubic meters.


TONELADA. f. Medida de la carga ó capacidad de una embarcacion que corresponde á ciento sesenta y seis palmos cúbicos y tres octavos de otro; ó á dos pipas de veintisiete arrobas y media cada una.

A measure of the capacity of a cargo or vessel which corresponds to one hundred sixty-six cubic palmos and three-eighths of another; or to two pipas of twenty-seven and a half arrobas each.

La Academia Española.
Diccionario de la Lengua Castellana. 10th ed.
Madrid: Imprenta Nacional, 1852.


Various units of mass used in Spanish-speaking nations, 20ᵗʰ century:


UN, 1966.

approximately 918.8 kilograms opens a new page containing a chart that shows relationships between this unit and other units in its system
Costa Rica

Technical Factors..., 1972, page 137.

= 920.00 kilograms. Used for sugar cane.

Technical Factors..., 1972, page 140.

= 20 quintales, 920.18 kilograms
El Salvador

Technical Factors..., 1972, page 155.

the tonelada corta,
= 20 quintales = 920 kilograms.

UN, 1966.

= 1 short ton,
approximately 907.185 kilograms 
Nicaragua 920 kilograms

UN, 1966.

918 kilograms
Peru 920 kilograms


The metric tonelada, used in Argentina and Colombia, ? – 20th century, = 1 metric ton =  1000 kilograms. In Colombia, the tonelada = 8 cargas = 16 saco de café.

United Nations, 1966.

Technical Factors..., 1972, page 134.


In Argentina, ? – 20ᵗʰ century, a unit of dry capacity = 7.5 fanegas, approximately 1,028.98 liters (about 29.20 bushels).

United Nations, 1966.


Two units of mass used in Portuguese-speaking nations:

In Portugal, reported in 1868 as 793.152 kilograms¹, in 1966 as 793.15 kg².

In Brazil opens map showing location of Brazil, approximately 793.238 kilograms².

1. Mappas das Medidas do Novo Systema Legal comparadas com as Antigas nos Diversos Concelhos do Reino e Ilhas.
Lisbon: Imprensa Nacional, 1868.
Page 297.

2. United Nations, 1966.

Where is Brazil?

A map showing the location of Brazil.

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