# Avoirdupois

Also found in: Dictionary, Thesaurus, Medical, Acronyms, Encyclopedia, Wikipedia.
Related to Avoirdupois: Avoirdupois system, avoirdupois ounce

## Avoirdupois

A system of measuring weight in which the basic unit is one pound, which is divided into 16 ounces. It is used in the United States, and to a lesser extent in the United Kingdom, Canada, and some former British colonies. Because it is not based on units of 10, it is not used in scientific settings.
References in periodicals archive ?
As a unit of measure, the ounce referred to 'a unit of weight equal to (a) one-twelfth of a pound in troy and apothecaries' measure, equal to 480 grains (= 31.1 grams); (b) one-sixteenth of a pound in avoirdupois measure (= ~ 28.3 grams)' (OED).
Our grain derives from the French avoirdupois system that evolved as a means to help regulate the products sold in trade.
Unit Equivalent in Metric Units Mass 1 short ton = 0.907 184 7 metric tons (t) (2,000 lb) 1 long ton = 1.016 047 metric tons (t) 1 pound (lb) = 0.453 592 37 (a) kilograms (kg) 1 pound uranium = 0.384 647 (b) kilograms oxide (lb uranium (kgU) [U.sub.3] [O.sub.8]) 1 ounce, = 28.349 52 grams (g) avoirdupois (avdp oz) Volume 1 barrel of oil = 0.158 987 3 cubic meters (bbl) ([m.sup.3]) 1 cubic yard = 0.764 555 cubic meters ([yd.sup.3]) ([m.sup.3]) 1 cubic foot = 0.028 316 85 cubic meters ([ft.sup.3]) ([m.sup.3]) 1 U.S.
Unit Equivalent in Metric Units Mass 1 short ton (2,000 lb) = 0.907 184 7 1 long ton = 1.016 047 1 pound (lb) = 0.453 592 37 (a) 1 pound uranium oxide = 0.384 647 (b) (lb [U.sub.3][O.sub.8]) 1 ounce, avoirdupois = 28.349 52 (avdp oz) Volume 1 barrel of oil (bbl) = 0.158 987 3 1 cubic yard ([yd.sup.3]) = 0.764 555 1 cubic foot ([ft.sup.3]) = 0.028 316 85 1 U.S.
Unit Equivalent in Metric Unit Units Mass 1 short ton = 0.907 184 7 (2,000 lb) 1 long ton = 1.016 047 1 pound (lb) = 0.453 592 37 (a) 1 pound uranium = 0.384 647 (b) oxide (lb [U.sub.3][O.sub.8]) 1 ounce, avoirdupois = 28.349 52 (avdp oz) Volume 1 barrel of oil (bbl) = 0.158 987 3 1 cubic yard = 0.764 555 ([yd.sup.3]) 1 cubic foot = 0.028 316 85 ([ft.sup.3]) 1 U.S.
Unit Units Mass 1 short ton (2,000 lb) = 0.907 184 7 1 long ton = 1.016 047 1 pound (lb) = 0.453 592 37 (a) 1 pound uranium oxide = 0.384 647 (b) (lb [U.sub.3] [O.sub.8]) 1 ounce, avoirdupois = 28.349 52 (avdp oz) Volume 1 barrel of oil (bbl) = 0.158 987 3 1 cubic yard = 0.764 555 ([yd.sup.3]) 1 cubic foot = 0.028 316 85 ([ft.sup.3]) 1 U.S.
Unit Equivalent in Metric Units Unit Mass 1 short ton = 0.907 184 metric tons (t) (2,000 lb) 1 long ton = 1.016 047 metric tons (t) 1 pound (lb) = 0.453 592 37 (a) kilograms (kg) 1 pound uranium = 0.384 647 (b) kilograms oxide (lb uranium (kgU) [U.sub.3] [O.sub.8]) 1 ounce, 28.349 52 grams (g) avoirdupois (avdp oz) Volume 1 barrel of oil = 0.158 987 3 cubic meters (bbl) ([m.sup.3]) 1 cubic yard = 0.764 555 cubic meters ([yd.sup.3]) ([m.sup.3]) 1 cubic foot = 0.028 316 85 cubic meters ([ft.sup.3]) ([m.sup.3]) 1 U.S.
Unit Equivalent in Metric Units Unit Mass 1 short ton = 0.907 184 metric tons (t) (2,000 lb) 1 long ton = 1.016 047 metric tons (t) 1 pound (lb) = 0.453 592 kilograms (kg) 1 pound uranium = 0.384 647 kilograms oxide (lb uranium (kgU) [U.sub.3] [O.sub.8]) 1 ounce, 28.349 52 grams (g) avoirdupois (avdp oz) Volume 1 barrel of oil = 0.158 987 cubic meters (bbl) ([m.sup.3]) 1 cubic yard = 0.764 555 cubic meters ([yd.sup.3]) ([m.sup.3]) 1 cubic foot = 0.028 316 cubic meters ([ft.sup.3]) ([m.sup.3]) 1 U.S.
Unit Equivalent in Metric Units Mass 1 short ton 0.907 184 7 metric tons (t) (2,000 lb) 1 long ton 1.016 047 metric tons (t) 1 pound (lb) 0.453 592 37 (a) kilograms (kg) 1 pound uranium 0.384 647 (b) kilograms oxide uranium (kgU) (lb [U.sub.3] [O.sub.8]) 1 ounce, = 28.349 52 grams (g) avoirdupois (avdp oz) Volume 1 barrel of oil = 0.158 987 3 cubic meters (bbl) ([m.sup.3]) 1 cubic yard = 0.764 555 cubic meters ([yd.sup.3]) ([m.sup.3]) 1 cubic foot = 0.028 316 85 cubic meters ([ft.sup.3]) ([m.sup.3]) 1 U.S.
Unit Equivalent in Metric Units Mass 1 short ton (2,000 lb) = 0.907 184 7 1 long ton = 1.016 047 1 pound (lb) = 0.453 592 37 (a) 1 pound uranium oxide (lb [U.sub.3][O.sub.8]) = 0.384 647 (b) 1 ounce, avoirdupois (avdp oz) = 28.349 52 Volume 1 barrel of oil (bbl) = 0.158 987 3 1 cubic yard ([yd.sup.3]) = 0.764 555 1 cubic foot ([ft.sup.3]) = 0.028 316 85 1 U.S.
Site: Follow: Share:
Open / Close