Changes

=== Pound (force) ===

=== Pound (force) ===

One [[Avoirdupois Pound|pound]] is either the mass of the international pound (or 0.45359237 [[kilogram]]), or more properly the force that gravity exerts on this mass on the ground on [[earth]].

One [[Avoirdupois Pound|pound]] (lb) is either the mass of the international pound (or 0.45359237 [[kilogram]]), or more properly the force that gravity exerts on this mass on the ground on [[earth]].

=== Ounce (force) ===

=== Ounce (force) ===

The grain is 64.79891 milligrams, and by convention one pound is 7000 grains.<ref name=graindef>[http://www.sizes.com/units/grain.htm Grain] at Sizes.com</ref>

The grain is 64.79891 milligrams, and by convention one pound is 7000 grains.<ref name=graindef>[http://www.sizes.com/units/grain.htm Grain] at Sizes.com</ref>

=== Ton ===

=== Stone ===

One US (or "short") ton is 2,000 pounds. An Imperial ("long") ton is 2,240 pounds. The latter is being replaced by the ''metric ton'' (tonne) of 1,000 kg, or about 2,207 pounds.

The stone, a unit of 8 lb, is very commonly used in the UK as a measure of weight, especially of people and animals. It is common, for example, for a British person to express his or her weight as ''9 stone 8 pounds'' (written 9st 4lb), meaning 130 lb or approximately 59kg.

=== Supplementary Units ===

=== Hundredweight ===

Originally the English system defined the ''hundredweight'' (abbreviated cwt) as one hundred pounds. This is slightly heavier than an ancient [[talent]]. In the UK, 1 hundredweight (cwt) is now defined as 8 stone, i.e. 112 lb; the hundredweight is still quite widely used as a measure of weight in the UK.

Originally the English system defined the ''hundredweight'' (abbreviated cwt) as one hundred pounds. This is slightly heavier than an ancient [[talent]]. In the UK, 1 hundredweight (cwt) is now defined as 8 stone, i.e. 112 lb; the hundredweight is still quite widely used as a measure of weight in the UK.

== Mass ==

== Mass ==