Convert from Imperial to Metric

Peter Voogt

Peter Voogt

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When it is pure for the calculation from Imperial to Metric, then I use this site with many kinds of calculation tables.
In this example also vice-versa and a lot of others:

Feet+Inches to CM (ft+in to cm) Converter

Feet+Inches (ft+in) to centimeters (cm) conversion calculator and how to convert.
www.rapidtables.com www.rapidtables.com

With a few examples for setting or what you can enter, with print-screens when using it on my iPhone:
You can select the value of input:
Select From.jpg

And the value of outcome:
Select To.jpg

You can also enter decimal fractions:
Input 15-64.jpg
After typing the input, hit the button [= Convert]
And with an integer in front of it:
Input 2 3-16.jpg
with this outcome:
Outcome 2+3-16.jpg

For vice-versa, this is a nice one, changing the values as show in the first 2 pictures:
mm-Inch.jpg
With the outcome in dec. and frac.

Hopefully it is useful form some of yours.
Regards, Peter
 
Last edited:
Kevin the Lubber said:
The funny thing about having done my apprenticeship in a trade that used imperial, but then spent my working life proper only using metric, is that I visualise in feet and inches but measure in mm.
Click to expand...

I share the same problem. Uni course in mid-60's in imperial, on site doing accurate surveying (7 figure log standard) in imperial, then worked in metric from mid-70s, but still think in feet & inches, pounds stones ounces & cwt. Although all trading and professions work in metric we still only have miles on road signs. What an oddball country we live in!
 
ChrisP said:
I share the same problem. Uni course in mid-60's in imperial, on site doing accurate surveying (7 figure log standard) in imperial, then worked in metric from mid-70s, but still think in feet & inches, pounds stones ounces & cwt. Although all trading and professions work in metric we still only have miles on road signs. What an oddball country we live in!
Click to expand...
More oddball than us Yanks and our mix of predominantly imperial with some metric tossed in?
 
Somewhere back in the sands of time, my brain locked onto and retained "2.54 centimeters to the inch". I've found that to be the key to doing the conversions myself, albeit with a calculator. Unfortunately, I didn't burn in the base conversion ratios for weight or volume.
 
Alskabear said:
Happy with my Iphone, convert everything I want.
Click to expand...
Hi ‘Alskabear’. Does it tell you what 0.0833” is in a fraction? Or what 2.11 mm is in a inch-franction?
Regards, Peter
Stuart Little said:
I use my vernier calipers switching between imp. & metric - always to hand.
Click to expand...
That’s correct, Stuart. Most of them does and it is in decimals. But does it tell you how much a fraction such as 3/16” of 13/64” is in mm?

That was our point: those fraction.
Regards, Peter
 
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Peter Voogt said:
Hi ‘Alskabear’. Does it tell you what 0.0833” is in a fraction? Or what 2.11 mm is in a inch-franction?
Regards, Peter

That’s correct, Stuart. Most of them does and it is in decimals. But does it tell you how much a fraction such as 3/16” of 13/64” is in mm?

That was our point: those fraction.
Regards, Peter
Click to expand...
Hi Peter, to answer both, (1) set vernier to 0.0833" then switch to metric & voila you have instant conversion - for 2.11mm it's the reverse.
(2) For fractions that are not implanted in my brain, I pick up my 0-1" micrometer & read off the printed data on it's frame.

Regards Stuart
 
Is there no app to convince every body who uses Imperial will finally switch to metric 8-) .

Maybe it will end up that in the UK they start driving on the right side :-) .

No just joking, wait untill you start building a 17th century ship, every single larger town had its own system in sizes. For instances Amsterdam foot measuring 0,2831 mm with 11 inches (duimen / thumbs) in one foot.

Thx to Napoleon there is now a metric system.
 
Stuart Little said:
Hi Peter, to answer both, (1) set vernier to 0.0833" then switch to metric & voila you have instant conversion - for 2.11mm it's the reverse.
Click to expand...
That’s not the answer on the fraction (*/*) question.;)
Stuart Little said:
(2) For fractions that are not implanted in my brain, I pick up my 0-1" micrometer & read off the printed data on it's frame.
Click to expand...
If the drawing makers also think and do that way, we no longer have a problem.:)

But perhaps it’s for ‘Imperial’s’ difficult to understand the ‘Metric’s’. ;) Stop with the fraction (*/*) and use metric-inches.ROTF
Regards, Peter
 
Maarten said:
Is there no app to convince every body who uses Imperial will finally switch to metric :cool: .

Maybe it will end up that in the UK they start driving on the right side :) .

No just joking, wait untill you start building a 17th century ship, every single larger town had its own system in sizes. For instances Amsterdam foot measuring 0,2831 mm with 11 inches (duimen / thumbs) in one foot.

Thx to Napoleon there is now a metric system.
Click to expand...
Some already try driving on the right - but they don't get very far!!:oops:
 
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I used to own a furniture company in the UK. Around 40 years ago a French company asked me to design some furniture and send them samples. So - as the UK were metricating and this was a French company I did everything using the metric system. The French customer got back to me and asked 'why is this scaled in metric units, we use feet and inches!'. Then I discovered that French cabinetmakers (ebenistes) had never metricated at the time of the revolution, but were deliberate hold-outs against Napoleon-imposed measurement systems.
 
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