Ounces to Hundredweight (US) (oz to cwt (US))

1 ounce equals 0.000625 hundredweight (US) exactly.

1 ounce = 0.000625 hundredweight (US)

How to convert ounces to hundredweight (US)

To convert ounces to hundredweight (US), multiply the number of ounces by 0.000625. This factor is exact. To go the other way, multiply hundredweight (US) by 1,600.

hundredweight (US) = ounces × 0.000625

Example: 10 ounces = 0.00625 hundredweight (US).

About these units

Ounce (oz)

US & ImperialCurrent unit

One sixteenth of a pound, exactly 28.349523125 g. Used for food, mail and consumer goods in the US and UK.

A twelfth part is what ounce originally meant. It comes from the Roman uncia, one twelfth of the Roman pound, a word that also gave English the inch. The abbreviation oz does not come from English at all but from the Italian onza or oncia. Over the centuries many regions and trades used different ounces: the English Tower ounce of 29.16 g was abolished by Henry VIII in 1527, and the Dutch ons was redefined as exactly 100 g in 1820.

The avoirdupois ounce used for everyday goods is one sixteenth of a pound, exactly 28.349523125 g or 437.5 grains, the standard in the US and under the UK imperial system. It is not the same as the troy ounce for precious metals, and neither is the fluid ounce, which measures volume. Ounces still describe portions such as steaks and burgers, and they show up in unexpected places: fabric is graded by weight per area, so a 16 oz denim is a heavy cloth, and the copper on a circuit board is specified in ounces, where 1 oz is roughly 34.7 micrometres thick.

1 ounce = 0.02834952313 kilograms (approximately).

Sources: Wikipedia: Ounce; NIST Guide to the SI, Appendix B.8 (mass conversions)

Hundredweight (US) (cwt (US))

US customaryTraditional unit (still used in some regions)

100 pounds (45.36 kg), also called the short hundredweight or cental.

Hundredweight is a half-translated Latin idea: centum means one hundred, and medieval English merchants spoke of a centum weight or quintal. Around 1300 several different hundreds were in use as weights. The British version was fixed at 8 stone, or 112 pounds (50.80 kg), by the Weights and Measures Act 1835, so that 20 of them made a long ton of 2,240 pounds. The United States and Canada instead adopted a plain 100 pounds, the figure of 45.36 kg used here.

That round American hundredweight is also called the short hundredweight, and 20 of them make the 2,000-pound short ton. Britain's 1824 act had barred a 100-pound measure because of fraud concerns, but in 1879 it was legalised there as the cental, after merchants importing American wheat and tobacco pressed for it. In the US the unit survives in livestock sales, some grains and oilseeds, paper and certain futures contracts. NIST lists it as 100 lb, about 45.359 kg.

1 hundredweight (US) = 45.359237 kilograms (exactly).

Sources: Wikipedia: Hundredweight; NIST Guide to the SI, Appendix B.8: conversion factors

Related conversions

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