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The Wikipedia article (https://en.wikipedia.org/wiki/Metrication_in_the_United_Kingdom https://en.wikipedia.org/wiki/Metrication_in_the_United_King...) mentions
by bloak 4y ago
The Wikipedia article (https://en.wikipedia.org/wiki/Metrication_in_the_United_Kingdom https://en.wikipedia.org/wiki/Metrication_in_the_United_King...) mentions three legal exceptions: road traffic signs; pints for draught beer and cider, and milk in returnable containers; and troy ounces for transactions in precious metals.
It doesn't mention one product that is very much in the news at the moment: energy. I'm fairly sure they still sell it by the kWh rather than the MJ.
Colloquially, people still talk about calories rather than kJ in food. (And they do that even in Germany, I think, one of the few places where they measure font sizes in mm rather than points, or so I've heard.)
EDIT: Perhaps kWh counts as metric, even though it's not SI?
- kalleboo 4y agoEverywhere I've lived people also discuss display sizes in inches despite everything else being metric.
- anonymous_sorry 4y agokWh is more metric than imperial, although Joules are of course the standard unit of energy. Watts are a metric unit, as are seconds. Hours are not formally an SI unit, but at least according to Wikipedia [0] are "officially accepted for use with the SI". [0] https://en.m.wikipedia.org/wiki/Non-SI_units_mentioned_in_the_SI https://en.m.wikipedia.org/wiki/Non-SI_units_mentioned_in_th...
- midasuni 4y agoA kilowatt hour is 1000 joules per second over 3600 seconds, the amount of power a 1kW heater uses in 1 hour. Its as metric as the hectare
- HPsquared 4y agoAnd 1 Joule is one Newton-metre (i.e. it takes 1 J to pull with a force of 1 N over a distance 1 m).
- anonymous_sorry 4y agoYou are right. Is say it is metric, if not standard SI.
- N19PEDL2 4y agoI guess kWh counts as metric, as W is SI and h is accepted by SI (as, for example, in km/h). The Imperial unit is maybe the calorie (I'm not sure though). EDIT: According to Wikipedia [0], the Imperial unit of energy is ft⋅lbf. [0] https://en.wikipedia.org/wiki/Foot-pound_(energy) https://en.wikipedia.org/wiki/Foot-pound_(energy)
- HPsquared 4y agoThe calorie is also kind of metric: the energy needed to heat 1 gram of water by 1 degree Celsius. The kcal (kilocalorie) is what most people mean when they refer to calories in food, and that's just the energy needed to heat 1 kg of water by 1 deg C. Since a person is mostly water this means that, say if you weigh 100 kg, and eat 1000 kcal of food, that food contains (theoretically) enough energy to heat your body mass by 10 deg C. The units do give a kind of intuitive understanding of the energy in food, while also being based on metric quantities.
- Symbiote 4y agoThe non-metric energy measurement in current discussion in Britain is the therm, 100,000 BTU. It seems natural gas is sold in this measure at some of the London exchanges. It's sold in MWh in the rest of Europe.
- xxs 4y ago>EDIT: Perhaps kWh counts as metric, even though it's not SI? No need for perhaps, unless it's btu (or some horse power/hour) it's metric.