Metric Punctuation Question

Discussion on Stirling or "hot air" engines (all types)
Post Reply
jimlarsen
Posts: 213
Joined: Sat Apr 17, 2010 11:04 am

Metric Punctuation Question

Post by jimlarsen »

When writing metric dimensions, is there a space between the number and the letters? I see it both ways, and wonder which is correct. Is it "10 mm" or "10mm"?

I am asking this here because I know there are many here with much more metric experience than I have.

Thanks.
vile_fly
Posts: 139
Joined: Sat Jan 01, 2011 9:53 am
Location: USA - Kansas City, Missouri

Re: Metric Punctuation Question

Post by vile_fly »

Google search likes "10 mm". Otherwise, both work for me.
Image Pssst! Hey you! Yeah, you. Over here....
Andrzej
Posts: 28
Joined: Wed Mar 11, 2009 10:17 am
Location: POLAND

Re: Metric Punctuation Question

Post by Andrzej »

vile_fly wrote:Google search likes "10 mm". Otherwise, both work for me.
Should be 10 mm - for exemple 10,09 mm, 100,29 m, 151,259 km
regards
Andrew
Ferraccio
Posts: 188
Joined: Thu Jan 27, 2011 10:57 am
Location: Italy

Re: Metric Punctuation Question

Post by Ferraccio »

Jim, i live in metric world
the rule is to separate numbers to letters, (10 mm), may happen that is written 10mm, is a formal mistake, but all understand.
Ferraccio
Posts: 188
Joined: Thu Jan 27, 2011 10:57 am
Location: Italy

Re: Metric Punctuation Question

Post by Ferraccio »

Andr indicates the metric way to separate the units to the decimals with the comma (,) normally in the States in used the point (.).
Carnot
Posts: 7
Joined: Thu Jan 27, 2011 1:52 pm
Location: Germany

Re: Metric Punctuation Question

Post by Carnot »

Ferraccio wrote:Andr indicates the metric way to separate the units to the decimals with the comma (,) normally in the States in used the point (.).
The use of the comma or point (radix) depends on the country, the comma is not used in all metric countries.
For example, metric Australia uses the decimal point
See...
http://en.wikipedia.org/wiki/Decimal_mark
Ferraccio
Posts: 188
Joined: Thu Jan 27, 2011 10:57 am
Location: Italy

Re: Metric Punctuation Question

Post by Ferraccio »

Australia come from English-US system; also in US there is a hybrid system of English-metric type (from the '70 the threads, bolts and screw for cars, are in metric, mm; and decimals are used also for part of inch -0.002", instead of fractiions -1/16"). Meaning: no one is obliged to adopt completely another system, especially at the international, and particularly in countries where it is important to be consistent with themselves.
Ian S C
Posts: 2218
Joined: Thu Dec 02, 2010 5:15 am
Location: New Zealand

Re: Metric Punctuation Question

Post by Ian S C »

We in New Zealand are supposed to be metric, but I use mainly imperial for my own work. But if I am communicating with someone else I try to use the figures that, that person would normally use. I have always written for example 10mm, but I must start to try and go to 10 mm, but I'll stick to (.)instead of (,)although it is easier to see the comma than the stop. Ian S C
Post Reply