Listen, it’s very simple: In Britain we use the metric system, except for beer and milk, which come in pints. But not plant milk — that comes in litres.

Oh, and distances are in miles. But only if they’re too far to walk — if you can walk it it’s in metres. If you’re driving then your fuel efficiency is in miles-per-gallon, but petrol is sold in litres.

Oh, and your height is in feet and inches. If you don’t care much about your weight it’s in stone (but not pounds — no-one can remember how many pounds are in a stone and it’s hard to read the little tick marks on analogue scales). If you do care about your weight then your digital scales tell you it in kilograms.

Oh, and if there’s a heatwave then tabloids will forecast a “100°F scorcher”. But if it’s cold then it’s an “arctic blast” with “widespread temperatures below 0°C”.

I hope this clears things up.

@katemorley

I know my height in feet and inches because it hasn't changed since Canada went metric, in the 1970s, but my weight in kg because it has changed. I know what it was in stones, because I grew up in England.

@Szescstopni

@katemorley @Szescstopni @EricLawton i’m canadian, still use pounds for people weight, feet/inches for height and short distances. metric is for grocery shopping and temperatures and driving distances and anytime i’m designing something (unless inches are more convenient).
@katemorley Haha, how absurd. Great info though.

@katemorley It reminds me of this flowchart of the Canadian unofficial measurement system:

(Sorry for the Reddit link)
https://preview.redd.it/dsmht7np3gl31.png?width=681&format=png&auto=webp&s=508db2b18252766b1b1dfe50bcd2eb836e77863e

I personally use a variation, where everything’s metric except distance.

@EdwinG

Long distance = time!

A few years back, a British couple at a gas station near Kingston asked me "how far is it to Montreal (or Toronto, I can't remember)?"

I responded, as you do, 3 hours or whatever. They looked at me as if I was crazy. I went inside to pay for the gas, and when I came out, they were asking someone else the same question. I presume they got the same answer. 😁🤣

@katemorley

@intothewestaway Story checks out!

Long distance: anything over an hour!
Montréal is an hour away from Montréal (roughly 20km).

@EdwinG @intothewestaway Do you have two Montréals then?

@blp We have four! Montréal the City, Montréal the Island, Montréal the Region and Montréal the Metro Area 😅

I had city-city in mind when I posted that.
@intothewestaway

@katemorley

The NHS uses metric now for weight and height 😉🤷‍♂️

@simonzerafa @katemorley NHS have done this for many years (also all kids born since 1970s were encouraged to monitor their height and weight in metric, and new babies are weighed in metric)
@vfrmedia @simonzerafa @katemorley
But the midwives 15 years ago still told us the babies' weight in pounds.
Btw, in the UK a pound is 454 g, in Germany it's 500 g 🤷🏻‍♀️
@MiBro
@vfrmedia @simonzerafa @katemorley Even in the Netherlands, which is firmly metric, babies' weight is traditionally given in pounds. Where a pound is exactly 500g/0.5kg.
@viccie30 @MiBro @vfrmedia @simonzerafa @katemorley in Luxembourg (and I guess it's the same for other western european countries?), it is very common to buy/order a pound a bread. It's also exactly half a kilo.
@simonzerafa @katemorley I knew my kids' heights in metric when they were young as that's how the NHS recorded them, but I've always been 5' 6". Except now I'm inexplicably 5' 5" 🤷

@callunavulgaris @katemorley

Thinge often do shrink with age 😉

Everthing is now metric I'm 91 Kgs 🙂🤷‍♂️

@katemorley 14. Pounds to the Stone.

@BackFromTheDud @katemorley The misplaced full stop makes it look like a track listing.

"Pounds to the stone" is a great name for a song. Bonus if it's track 14 on the album, too.

@BackFromTheDud @katemorley are these 454g pounds or 500g pounds? 😆
@katemorley except plant milk delivered in refillable bottles by the milkman: that's in pints!
@wjt @katemorley you still have milkmen?
@CorvidCrone @wjt @katemorley Yes we do. Here are the empty one’s ready for replacement by delivery in the wee small hours of Monday morning by the Milkman in his electric milk float (so he doesn’t wake folk with a noisy diesel). The cat is just making sure they’re empty and ready for another 3 pints !
@Montezuma1K @CorvidCrone @wjt @katemorley
You have plant milk delivered by the milkman?
Wow, I'm impressed.
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We deliver across Britain, view where to buy, and the milk rounds we have partnered with. Input your postcode to see if they can deliver Oato to your doorstep.

@Sarahw @Montezuma1K @CorvidCrone @wjt @katemorley We used to have a milkman when we lived in a village. Now we're in town we use the milk vending machine run by a local dairy farm and it's firmly in glass litre bottles.
Oatly banned from using word ‘milk’ to market plant-based products in UK

Swedish company claims ruling is anti-competitive and ‘solely benefits Big Dairy’

The Guardian

@katemorley And most people talk about height and weight in feet, inches and stones, but in a medical setting, it's all in metric.

The temperature one bugs me, because I guess I have developed instinctive conversion tables for most things but Fahrenheit is used so rarely, I just have no idea beyond "100F is a very hot day or a mild fever."

@katemorley 😂 Let's not even start on land areas (Wales-equivalents, etc!)
@MW1CFN @katemorley over here (NL) news agencies use “football fields” as area metric. “The fire destroyed 50 football fields of forest”. And for you US folks, don’t worry. It is only soccer.
@katemorley
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@katemorley We should all adopt the furlong-firkin-fortnight system. It will be simpler.
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@katemorley that’s why Canadians feel so much at home in the UK, aside from the silly stones.
@katemorley you forgot furlongs, and drams.

@flipper @katemorley Nobody uses furlongs in day-to-day speech. The closely related acres, on the other hand…

I believe railways are still measured in chains, though.

@katemorley

Canadian here. can confirm. Also cups, onces and grams.

@katemorley oh, if you explain it this way, it all amoes sense now :D but seriosly. I've always wondered what the heck is a stone.
Stone (unit) - Wikipedia

@csstrowbridge I don't know why the different stone weights were the weights they were, but I do know that livestock was measured in 14# stones, and that's presumably why live humans (and maybe recently dead ones, too) are measured by that particular stone, instead of a different one.
@katemorley I know that nominal limber sizes are in inches (four-be-two), but I wonder if planks are sold in lengths of feet or metres.

@StarkRG @katemorley Lengths of timber are usually “metric feet” - multiples of 300mm. E.g, 2400, 2700, 3000 or 4200mm, just as often written in metres so 4.2m, etc. Building sites these days are usually laid out on a 600mm grid. Joists and rafters are typically spaced at 400mm or 600mm centres.

Dimensions in inches (like 2-by4) are the rough-sawn pre-planed dimensions. Planed dimensions are given in millimetres so 2x4 might be something like 47x100mm. I've been confused for a while about why some is 45mm and some 47mm.

Sheet goods (like plywood) are referred to colloquially as “8x4” but that can be either 2400x1200 mm or actual 8'x4': 2440x1220mm. If you really care you have to be specific.

Thicknesses of ply, OSB, etc, are done in mm but they're rounded versions of the old inch dimensions so typically 6, 11, 15, 19mm and so on.

As with timber dimensions, plumbing goods use inches and mm in different ways. E.g., a ½" pipe is 15mm because the ½" references the inside diameter whereas the 15mm is the outside diameter. Plastic pipe (with its thicker wall thickness) breaks the assumptions here so «½"» plastic pipe has an outside diameter of 15mm but an inside diameter considerably less than ½".

@edavies @StarkRG @katemorley Actually , imperial BSP pipe sizes used to be the standard but were replaced by metric for most applications about 50 years ago. The 2 are not compatible, but you can get adapters, as tap and hose fittings are still BSP, and some older installations do still exist.
Speaking from experience, as I have had to make tapered pipes to match up sizes in an old property about 25 years ago.

@wyliecoyoteuk Oh, TIL, ta. I think 15 mm pipe is still colloquially called ½", though?

This is mildly relevant to me as I'll need to replace my kitchen taps at some point, though the short flexible pipes they come with should deal with this?

@StarkRG @katemorley

@edavies @wyliecoyoteuk @StarkRG @katemorley Plumbing in the UK is just water lego. But generally yes, anything 1/2" BSP is for 15mm pipe and 3/4" is for 22mm pipe. Occasionally you will come across real 1/2" pipe but it's rare these days.
@edavies @wyliecoyoteuk @StarkRG @katemorley And if you do, adapters are easy enough to find. For anything really odd I recommend bes.co.uk
@jamesb @wyliecoyoteuk @StarkRG @katemorley It's waste pipes which really confuse me. None of the stated mm dimensions seem to correspond to either the actual inside or outside diameters.
@edavies @wyliecoyoteuk @StarkRG @katemorley Wait until you find out the difference between solvent weld and push-fit/compression pipe sizes ;-)
@jamesb @wyliecoyoteuk @StarkRG @katemorley Exactly, that's what got me. At least, I think so…
@jamesb @edavies @StarkRG @katemorley 1/2" and 3/4" BSP fittings are still common and are used for taps, radiator valves and garden hoses amongst other things.
They are not compatible with 15mm and 22mm.
@wyliecoyoteuk @edavies @StarkRG @katemorley Are we going to argue semantics here?
@jamesb @edavies @StarkRG @katemorley
Not semantics. Physical differences and experience of renovating kitchens and bathrooms. BSP has not gone away, as you will find if you try to connect a 15mm fitting to a tap.
@wyliecoyoteuk @edavies @StarkRG @katemorley Compression fittings for 15mm pipe have a 1/2" thread, for 22mm they have a 3/4" thread. It's not advisable to use them as such but it works. See also the flat vs normal fittings for flex hoses.
@jamesb @edavies @StarkRG @katemorley
If you try to connect a BSP fitting to a metric one, you either strip one of the threads or end up with a leaky connection.
https://www.screwfix.com/p/essentials-flexible-tap-connector-22mm-x-3-4-x-1000mm/33944
@jamesb @edavies @StarkRG @katemorley Strangely enough, some Chinese manufacturers still use BSP fittings. I had an inflatable hot tub with 1" BSP pipe fittings. The metric equivalent 25mm did sort of fit, but leaked.
@wyliecoyoteuk @edavies @StarkRG @katemorley I mean... I'd be pissed off if I got something without BSP fittings. M25 sounds like a nightmare to find fittings for.

At least with NPT you can use a load of PTFE and get it working.