Funny thing is the mph and kph conversion is real simple
50km/h is 30mph,
60km/h is 40mph,
80km/h is 50mph,
100km/h is 60mph
120km/h is 75mph

Those are not exact, for example I know that 100kph is really 62.1 mph, but it's close enough.
At 100km/h or 60mph I will cover roughly the same distance in one hour.

When I first began to drive I would do the conversion from mph to km/h, now it's km/h to mph.
Also In case you're on the ball and noticed I used km/h and kph, both are acceptable.

BTW it took way longer to type this, than to do the conversion, again I did the conversion in my head in seconds.

Uuuh, do what now?

Date was set in 1966 - but it was first proposed in 1824 (according to WIkipedia) - after the French went to a decimal franc in 1795.

UK continued to use SAE and Imperial standards e..g measurements, gauge, threads - in engineering for somewhat longer than that.

But pretty much the only pre-decimalization measurement that remains now is the pint of beer/cider/milk. Sacrosanct. Oh, and troy ounces for precious metals.

NZ switched to the NZ dollar in 1967, Australia decimalized in 1966.

That's a good trick.

After every fill I write the kilometres travelled on that tank on the gas slip and calculate the kilometres per litre. I confess that I then convert to miles per Imperial gallon, by multiplying by 2.84. :D

Same reason the Chicago to New York train- takes hours longer than it did 100 years ago. Kind of.

Modern version:
The Acella Train ( D.C. to Boston) was suppose to take x mount of hours but they translated the width off the tracks (inches) too wide compared to the spacing of the wheels ( Metric ) European train on American tracks. Train cannot reach top-speed.There is also the fact that the tracks are too "bumpy" which has less to do with measurement..

Just saw this on a knife discussion

http://uploads.tapatalk-cdn.com/2016...6a1a45559f.jpg


Sent via Jedi mind trick.

The Apollo Guidance Computer was programmed in SI, but displayed and accepted data in English units. ;)

I just multiply KPH by .6 to get MPH. The math is easier for me than memorizing a conversion table, and it's fairly close.

The thing is for Canadians memorizing a speed conversion table is easy as every car since the 80's has a speedo that's marked in both km/h (large font) and mph (small font).
Anything out of the normal car speed range and I'd likely have to do the math.

I no longer convert most measurements, it's the same as learning a 2nd language, if you use it every day you will be fluent, if you stop using one you will forget quickly.

"Why aren't we using the metric system?? "

We are.

The US uses both.

I use SI daily. (engineering)

And don't drug dealers, for the past 5 decades, sell by the gram? or is it oz?