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Praetorianus November 7th, 2017 2:48am

Are you at least familiar enough with the metric system to convert basic units like kilogram, meter, liter to imperial units in your head? Doesn't have to be exact, just ballpark.

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LadyA Earth Explorer
11/08/17 7:20 am

Metric is easy. Everything breaks down into 10.

Imperial lacks logic imo. Why are there 12 inches to a foot but 3 feet to a yard?! Weight makes even less sense. I don't understand why some insist on keeping this nonsense when even engineers and architects here use metric.

11/07/17 8:14 am

I can ballpark a few things. Never really used metrics except in high school chemistry. When a conversion is needed now, a smart phone makes it simple and quick.

swervin Maryland
11/07/17 6:12 am

Yes. A meter is about 3 feet. 1 gallon is about 4 liters. I think 1 mile is about 1 1/2 kilometers, so yeah, I could ballpark most of them.

FarmerManE djent
11/07/17 6:02 am

Down in small numbers, I can convert from inches to mm. Its handy when your missing a wrench from one set, but have it in the other

Liberty Lets Use Logic
11/07/17 4:50 am

No, they’re just random nonsensical terms.

RussianThunder Russia and USA
11/07/17 4:49 am

It’s the reverse for me. Metric is easy and everyone uses it but the US. So, I’m trying to convert metric into feet, inches, miles etc.

rons on top of the world MA
11/07/17 8:07 am

I’ve done a lot of building and woodworking and had problems with metrics. You get so used to fractions, inches and feet. My rulers with metrics have too many numbers.

lightsabr2 The Wild Blue Yonder
11/06/17 10:21 pm

After a couple deployments, everything in KMpH and the gym full of 20 kilo plates (and maybe drinking a few 2 liters along the way), I have a rough idea.

chinito Florida
11/06/17 10:18 pm

Yep. I grew up using metric so I can use either one.

Zod Above Pugetropolis
11/06/17 9:46 pm

Definitely. You can do speeds in your head by just remembering 25=40 or 62=100. Distances the same, or 1.6 to 1. Lengths as 30.5 cm per foot, 2.5 cm per inch, 39 inches per meter. 3.8 liters per gallon. 2.2 pounds per kg. You can do temperatures by remembering to add or subtract the initial 32, as necessary, and the difference above/below freezing is 1.8 to 1 (easier as 2-10%). They’re all pretty simple, but the easiest way is to just stop doing conversions and remember 25 is heavy to carry, anything over 25 is too hot, anything below 10 is getting coolish, over 150 is fast, below 50 is slow, and 10 is close to the limit of "walking distance".

phalnx Ohio
11/06/17 8:58 pm

MPH yes, because I've driven in Canada extensively. All the other stuff, hells no.

cpaswr 864511320
11/06/17 8:31 pm

I can do most of those calculations easily.

Praetorianus Fair enough.
11/06/17 9:39 pm

Probably the hardest is conversion of fuel efficiency from miles to the gallon to liters per 100 kilometer because the division is switched.

11/07/17 1:19 am

I know these 4 calculations. Anything between them or high/lower I can triangulate for an approximate number.

8 L/100 KM = 12.5 KM/L = 29 MPG
7 L/100 KM = 14.3 KM/L = 33 MPG
6 L/100 KM = 16.7 KM/L = 39 MPG
5 L/100 KM = 20 KM/L = 47 MPG

Notice the MPG changes by 4, 6, 8, it’s not linear (math I know) but something to remember.

presrvd Phoenix
11/06/17 8:24 pm

I used it for over a decade in the Field Artillery. Those conversions are almost second nature....

11/06/17 8:18 pm

I’m better at having an idea of approximate size comparison between metric and standard hardware sizes

CrazDab Florida
11/06/17 8:13 pm

Funny. A Canadian asked me a question...."we were doing 65mph." Was that fast enough? I said "indeed!" "About 100 kph?"
I'm well rounded. My parents did a good job 👍😎

Casper Deep inthe Heart ofTexas
11/06/17 8:11 pm

I know the basics, 2.54 cm/in & 39.37in/m

I’m ignorant in grams.

Google is great.

Praetorianus Fair enough.
11/06/17 8:30 pm

If you want just an approximate, I came up with this rhyme for two units:

Meter is yard,
Liter is quart.

badattitude no place like home
11/06/17 8:10 pm

No he means imperial gallons. Does anyone use those anywhere anymore? The Canadians did in the 70's.

Praetorianus Fair enough.
11/06/17 8:29 pm

I call our units gallon/inch/ounce etc imperial.

bluerum29 optimistic idealist
11/06/17 8:42 pm

I call them standard or customary.

jakecrs905 Long Island, NY
11/06/17 7:58 pm

Yeah after living in France for 4 months I got pretty good.

Praetorianus Fair enough.
11/06/17 7:51 pm

Sure, it's not that hard. You can probably learn the basic conversion rules of thumb in less than an hour.