Subject:
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Re: Conversion between LDU, inches and millimeters
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Newsgroups:
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lugnet.faq
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Date:
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Tue, 24 Aug 1999 23:21:10 GMT
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Reply-To:
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JSPROAT@spamcakeIO.COM
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Viewed:
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6189 times
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Robert Munafo wrote:
> The inch to millimeter conversion is (by international standard) exactly 25.4
> millimeters to an inch. That is also an exact figure (by international
> agreement).
This surprises me. *Exactly* 25.4 mm / inch? I thought that the conversion
rate was kind of one of those irrational numbers (1) that had digits
trailing off into infinity or, failing that, Imelda Marcos' shoe closet.
:-,
> When you do the math, you get the following conversion factors, each with its
> corresponding error term:
> 1 LDU = 0.3993 +-0.0001 millimeters
> 1 millimeter = 2.5043 +- 0.0006 LDU
> 1 LDU = 0.015720 +- 0.000004 inches
> 1 inch = 63.611 +- 0.016 LDU
*This* is cool. Thanks for the table!
Cheers,
- jsproat
1. Arguably since we're converting between metric and an irrational
measurement system, but I digress. :-P
--
Jeremy H. Sproat <jsproat@io.com>
http://www.io.com/~jsproat
Darth Maul Lives
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Message has 2 Replies:
 | | Re: Conversion between LDU, inches and millimeters
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| (...) 25.4 (...) Yes. Here is a table provided by Lycos: (URL) down and notice that the value for inch->millimeter is given as "25.4000" The story I heard is that, at some point around 100 years ago it was decided to redefine the English weights and (...) (25 years ago, 24-Aug-99, to lugnet.off-topic.geek)
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Message is in Reply To:
| | Conversion between LDU, inches and millimeters
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| (...) Conversion constants are much more relevant to the stud pitch than the brick height or width, because brick heights and widths are subject to the error caused by the fact that LEGO always designs elements so there will be tiny gaps when (...) (25 years ago, 24-Aug-99, to lugnet.faq)
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