Brexit: A Primer

 Eric Williams | 24 June, 2016
For all my EU friends currently living in the UK, here’s what the country’s referendum means to you.
Table of mass units
Unit Pounds Grams Kilograms Notes
grain (gr) 17000 0.06479891
Exactly 64.79891 milligrams.
drachm (dr) 1256 1.7718451953125
ounce (oz) 116 28.349523125
pound (lb) 1 453.59237 0.45359237
Exactly 453.59237 grams by definition.
stone (st) 14 6350.29318 6.35029318
The plural stone is often used when providing a weight (e.g. "this sack weighs 8 stone").[30] A person's weight is often quoted in stones and pounds in English-speaking countries that use the avoirdupois system, with the exception of the United States and Canada, where it is usually quoted in pounds.
quarter (qr or qtr) 28 12.70058636
One quarter is equal to two stones or a quarter of a hundredweight. The term quarter was also commonly used to refer to a quarter of a pound in a retail context.
hundredweight(cwt) 112 50.80234544
One imperial hundredweight is equal to eight stones. This is the long hundredweight as opposed to the short hundredweight of 100 pounds as used in the United States and Canada.[31]
ton (t) 2240 1016.0469088
As with the US and Canadian[31] systems, twenty hundredweights equal a ton. The imperial hundredweight is 12% greater than the US and Canadian equivalent. The imperial ton (or long ton) is 2240 pounds, which is much closer to a metric tonne (about 2204.6pounds), compared to the short ton of 2000 pounds (907.185 kg).
Gravitational units
slug (slug) 32.17404856 14593.90294 14.59390294
The slug, a unit associated with imperial and US customary systems, is a mass that accelerates by 1 ft/s2 when a force of one pound (lbF) is exerted on it.[32]
F = ma (Newton's second law)
1 lbF = 1 slug × 1 ft/s2 (as defined above)
1 lbF = 1 lbm × g (by definition of the pound force)
g 32.17404856 ft/s2
1 slug 32.17404856 pounds