Ounces to Hundredweight (UK) (oz to cwt (UK))

1 ounce equals 0.0005580357143 hundredweight (UK) (rounded).

1 ounce = 0.0005580357143 hundredweight (UK)

How to convert ounces to hundredweight (UK)

To convert ounces to hundredweight (UK), multiply the number of ounces by 0.0005580357143. The factor is rounded to 10 significant digits. To go the other way, multiply hundredweight (UK) by 1,792.

hundredweight (UK) = ounces × 0.0005580357143

Example: 10 ounces = 0.005580357143 hundredweight (UK).

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 (UK) (cwt (UK))

Imperial (British)Traditional unit (still used in some regions)

112 pounds (50.80 kg), eight stone. Twenty of them make a long ton.

Hundredweight, abbreviated cwt, comes from the medieval Latin centum for a hundred, though the English hundred around 1300 varied in size. The Weights and Measures Act 1835 fixed the imperial unit at 112 pounds, which is 8 stone, or about 50.80 kilograms. NIST gives the factor as 50.80235 kilograms and does not mark it as exact.

A rival 100 pound version crossed the Atlantic and was used in the United States and Canada. Britain banned it in 1824 over fraud fears, then legalised it in 1879 as the cental after merchants importing American wheat and tobacco pressed for it. Twenty long hundredweight make a 2,240 pound ton. The unit measured cattle, fodder, fertiliser and coal, and old anvils and church bells carry weights stamped in hundredweight, quarters and pounds. Guernsey and older van and truck ratings still use it.

1 hundredweight (UK) = 50.80234544 kilograms (exactly).

Sources: Wikipedia: Hundredweight; NIST SP 811, Appendix B.8 conversion factors

Related conversions

See all weight & mass units.