For instance, a foot…is basically a foot length. So there’s this foot-measuring waddle some people do walking literally heel-to-toe to get a general sense of the space. An inch is kinda a finger width, etc (they’re all not perfect by any sense).
I’ve decided to just take the plunge and basically re-learn all my measurement systems because I’m seeing less and less of those being used. I started with just memorizing all the conversions but that’s literally just adding another step. Everything I own basically has settings to switch or show both measurements (like tape measures) so I’m just going to stop using Fahrenheit and the United states “Customary System” all together.
Any tips or things you’re taught or pick up on? There’s a funny primary school poem for conversion of customary liquid measurements,
Land of Gallon
Introducing capacity measurement to learners can be challenging. To make this topic more accessible and memorable, we can integrate creative and interactive activities into our teaching approach. Using storytelling, we can transform the sometimes daunting task of learning measurement conversions into a whimsical tale.
- In the Land of Gallon, there were four giant Queens.
- Each Queen had a Prince and a Princess.
- Each Prince and Princess had two children.
- The two children were twins, and they were eight years old.
Once students are familiar with the story be sure they see the connection between the story characters and the customary units of capacity measurement. If necessary, label the story pieces with their corresponding units of measure: queen = quart, prince/princess = pint, children = cups, 8 years old = 8 fluid ounces. You can reduce the number of customary units in the story based on student readiness. link
tl;dr looking for anything to remember the hierarchy and memorizing the metric and Celsius measurement system, sometimes explained in schooling or local sayings. (if I had an example for those systems I would give one lol).
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For distance:
For temperature (for me):
For weight, it is too dependent on your strength. For some, lifting a 20kg sack of flour would be to much, for others grabbing two 40kg sacks of cement per trip to the palet is normal.
Your temperature scale is clearly from a northern country :P
As a northen-ish countryperson. I share this scale
Quite the opposite
10cm is long. don’t let anybody tell you otherwise
Spreading my hand out, the distance between the tip of my thumb and the tip of my pinky is almost exactly 20 cm.
When I need to measure something like a piece of furniture, I “crab walk” my hand along its side, counting 20 cm for every step.
The military and doctors in the United States officially use the 24 time format, there is something to think about (when we talk about accuracy and adequacy)
I switched over all my devices to 24 hour - phone, computers, cars, etc. I even change the settings on my wife’s phone sometimes. It’s so much easier to mentally read.
You can walk a klick in 10 mins
A ruler is 30cm. Roughly a third of a meter.
Four cups to a litre.
realistically, nobody uses all the units.
eg, decimeters are practically unheard of.
anyway, start measuring things around you. like your fingers, your hand, your ceiling height, that sort of thing. and then remember what those measurements feel/look like. that’ll give you something to compare other things to. you can do the same thing with volume measurements and so on.
for example, i found that one of the knuckles on one of my fingers is exactly 4cm long, so i always have that with me.
I use micrometers µm when I buy a water filter (mechanical), µm 1 micrometer traps debris more than µm 5 micrometers and bacteria, as well as some large viruses.
There is so much potential for unused unit systems. Imagine if gigameters where used instead of light years!
1 km is about 15 minutes walk.
1 meter is about a step.
1 cm is about the thickness of a gusset on medium sized industrial machinery
1 kg is about 2 pints (or a little more than a quart)
20°C is comfortable for most people, 35+ is uncomfortably warm
2 pints of lead is about 1kg?
A kg is a measure of mass. A pint is a measure of volume.
This has messed with my head that you’ve equated them with each other.
I’m guessing you meant a litre is about 2 pints?
I wrote 2 pints of water, but the sentence flowed weirdly. Idk
That’s nice, though I’d say 1 meter is more like a long stride, or at least two walking steps.
30 is hot, 20 is nice, 10 is cool, 0 is ice.
Honestly, with metric, 24 hour time and celcius, the easiest way to learn is just to switch to it completely.
I’m in an imperial country and still switched over to metric/24h/c just because it makes a lot more sense for most personal stuff. It’s been enough years that I know much of it just ambiently. I prefer it, tbh.
You don’t really need to remember conversions within units, because it’s all in base 10. Apart from that, 1 millilitre is 1cm³ of water, which weighs 1 gram, and requires 1 calorie of heat to increase its temperature by 1°C.
A good base is knowing milli is a thousandth and kilo is a 1000 1000 milligram = a gram, 1000 grams = a kilogram 1000 millililters = a liter, 1000 liters = a kiloliter 1000 millimeters = a meter, 1000 meters = a kilometer
Plus, they’re all connected. 1 gram of water is 1 milliliter and takes up 1 cubic centimeter.
To heat said water by 1 degree celsius (or kelvin) you need one calorie. If one newton were to displace that water through the distance of one meter, the amount of work done would be 1 milijoule.
Ive never heard kiloliter, at that point I say a thousand liters, or a cubic meter.
YES! I feel like a common pitfall people run into is trying to bust out all sorts of fancy prefixes, deka, hecto, centi, deci, etc and people get overwhelmed by all of that.
The most common prefixes are kilo 1000x or milli 1/1000. That’s all you should focus on.
I mean centimeters is probably the most common in households and centiliters at least in cocktail recipes. But yes, you don’t really need deka, hecto or deci in your daily life and you can grow up not knowing they exist at all. It would also make things like tape measures too complicated to look at.
I’m curious, where are you from? In the US, I’d say we think of centimeters as a pseudo-inch, so I think I understand why people would gravitate to centimeters here.
But do other countries use centimeters as much? I’m especially curious about really metric countries like Japan or (who else?) France? Germany? I wouldn’t be surprised if Canada or UK use centimeters.
Related: centimetres or millimetres
I’m from Germany and we use cm a lot. I can’t imagine not having anything between mm and m, the gap is huge. Those are probably the most used ones in daily life and km for distances farther than 999 m.
Here’s a common German tape measure next to a book, which is 20.6 cm (206 mm, 0.206 m) long:
Cool! Thanks for sharing!
Now that I think about it, I think I own a carpenter’s measuring tape. Maybe that’s why they don’t call out cm.
Also just to be clear, my measuring tape is definitely not a standard tape you can buy at a local hardware store. It took some effort for me to find a metric-only measuring tape.
Interesting, I’ve never seen a tape measure like this. In the end it’s the same thing, just remove a zero and you have cm. That’s the magic of it.
But i understand now how you came to the conclusion that centi is not used that much.
I really hope the US will at some point adopt the objectively better metric system!
Me too. I’m trying! 🤝
If it’s 0 degrees outside you’re cold, if it’s 100 degrees outside you’re dead.
This is how I was taught it in school:
1 cm is about the width of the tip of your pinky finger.
1 m is about the distance from your nose to your fingertips if you hold your arm out, and extend your fingers.
100 m is the length of the straight section of an athletic track, which is about the same length as a football field.
1 mL is about the volume of the tip of your pinky finger.
1 L is about 1 quart, which is half a carton of milk (unless you get milk in the smaller 1 quart size).
The mile-to-km conversion is pretty close to 1½.
The kg-to-pound conversion is two-and-a-bit.
A difference of 1°C is close to a difference of 2°F.
Edit: My milk comparison was wrong - I’ve corrected it.
Edit: Of course by “m” I meant “mile”
The m to km conversion factor is exactly 1000. Same with g to kg and Pa to kPa, W to kW etc.
(maybe you were going for mi to km? Which is 1.6?)
Yes, I meant miles, but I forgot about the abbreviation collision
I raised my kids using metric temperature for weather. Now that they’re older they hold me to it!
Uhm, it might sound arrogant but in metric you don’t need that sort of thing? The next order of measurment is just ±10^x where X is the number of dimensions you want to look at: 10 for i.e. length, 100 for area and 1000 for volume.
Lets look at length: Most commonly used are Millimeter, Centimeter, Meter and Kilometer.
Meter is the base. The name centimeter derives from meter and the Latin word centum meaning 100.So a centimeter is hundredth of a meter (decemeter, 10th, ist not really used much in everyday life). One step further down is millimeter: mille is Latin for thousand, therefore a millimeter is a thousandth of a meter.
Going up Greek prefixes are used: Deka-(10) and hektometer (100) are rarely used and Greek chilloi means thousand and therefore a kilometer is 1000 meters.
Staying in one dimension the same applies to gramme for weight: Milligrams, Gram and Kilograms are the moat common.
Going up in dimensions we use the same prefixes but the multiplyer changes because 10^2 is 100. So to go from 1 m² (one meter to the width times one meter depth) to 1 km² (thousand meters wide times thousand meeter deep)) the multiplier is not 10³ (1000) but 100³.
The whole prefixes are effectively optional and just for better readability.
Not arrogant, I get the hierarchy statements being mundane especially for someone who’s inundated within the systems themselves. The honest answer to this is sometimes everyone doesn’t learn at the same pace or get upset when they’re confronted with something different. For instance, if I were working with someone that didn’t complete school or had a learning disability, I could see them eventually grasping milli and centi (I still hesitate with if I’m using them properly with MM/mm/mM) but then hekto-deka is another tall order for someone who just wants to get off work and have a beer without the hassle lol. A school yard saying that uses order listing as an acronym for a Mnemoic like EGBDF in music (Every Good Boy Does Fine) would be cool.
Mostly though, it’s more about like the “foot” measurement thing. Something like wrapping my head around the average body weight, cool factoids like comparing volumes of water or like someone commented that 100 is the boiling point, etc.
edit: @donuts@lemmy.world just responded with the mnemonic I was looking for lol.
As many other said, milli and kilo are the prefix you are going to use 90% of the time, with the exception of centimeters. Food and beverage products are measured in kg, liters or milliliters, furnitures are measured in mm, cm or meters, distances are in meters or kilometers. Everything else is relatively uncommon. If you are not used to them you can still use some rough estimates, at least to get a sense of scale, but it’s generally not used by people who learn it first.
For example, the width of a finger is a few centimeres, a bottle of water is usually 1 or 1.5 liters, a leg of an average male is around 1 meter long, a kilometer is how much you walk in 5 minutes, and so on.
As for the writing, the rules are quite simple: the base measurement is always in lowr case (m, g, l), you might see liter written as L instead of l but, while common, is technically wrong. For the modifiers, most are lower case, some are upper case to distinguish
1000 = kilo k 100 = hecta = h 1/10 = deci = d 1/100 = centi = c 1/1000 = milli = m 1000000 = mega = M
There are more specific rules for scientific units of measures, like if the abbreviation of the base unit is more than ine letter, the first is upper case (1 Pascal, the measure of pressure is 1 Pa instead of 1 pa), but if you don’t work in STEM, you likely won’t care.
Sure, it’s always a step of 10x, but you do have to remember all the prefixes. Or you can only remember the 1000x prefixes - but you also need to remember centi-. Then, nobody says “megagram” - it’s “ton”. So there are quirks to remember.
We absolutely should, though… That and megameters, for car mileage. We always round off to the nearest thousand kilometer anyway.
Yes/No. There are quirks such as “ton” but in essence you can say 1 million gram and everything is fine. Remembering all those short forms is a nice to have, not a requirement.
*tonne
There’s a strong possibility that I’m just dumb, but this used to trip me up at first. Especially if I was on the spot: 1250mm to m, go! Uh, 125.0? Uh, 12.50?! Uh, 1.250! Yeah!
Or 1.5L to mL, go! Uh, 150mL? Uh, 1500mL! Yeah!
Also, realizing that the most popular prefixes are either kilo 1000x or milli 1/1000 helped. For example, cm don’t seem very common, like dimensions are almost always in mm.
I heard someone say once, the metric system is better by a thousand.
For daily use of temps, I found it best to just switch my apps and stuff to use Celsius. Then just made a point to take mental notes as to see what the current temps were on my devices. Especially when it was feeling too hot or cold. On days that felt nice, would see what temps they were and just kind of learned what ranges were between them (I tend to find 16-23C to be fine warm temps).
I can’t say exactly what the temps in Fahrenheit directly. But can give a range for friends and co-workers if they happen to ask me what the temps are outside (they obviously take the Celsius value as not helpful but they know I am going to give them). I can say that for me the “exposure therapy” of just using Celsius has been much easier than things like distance. I can kind of handle thinking of static distances, but I am not able to translate active things like speed.