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Gauge (Thickness) to inches
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Our forum has been available for many years. In September 2014 we decided to switch it to read-only mode. Month after month we saw less posts with questions and answers from real people and more spam posts. We were spending more and more resources cleaning the spam until there were less them 1 legitimate message per 100 spam posts. Then we decided it's time to stop.
All the posts in the forum will be available and searchable. We understand there are a lot of useful information and we aren't going to remove anything. As for the new questions, you can always ask them on convert-me.com FaceBook page
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8 posts
• Page 1 of 1
Gauge (Thickness) to inches
by Mark » Fri Feb 06, 2004 5:23 pm
I need the formula to convert (wire) gague to inches! I knew it once, but well, it must be old age!
- Mark
Re: Gauge (Thickness) to inches
by Knight » Fri Feb 06, 2004 8:19 pm
A good reference is at http://www.sizes.com/materls/wire.htmMark wrote:I need the formula to convert (wire) gague to inches! I knew it once, but well, it must be old age!
- Knight
- Expert
- Posts: 309
- Joined: Tue Jan 13, 2004 9:43 pm
- Location: Los Alamos, NM
- Guest
by Guest » Thu Apr 14, 2005 8:42 pm
For AWG (AMerican Wire Gauge) only, see
http://www.powerstream.com/Wire_Size.htm
The formula is
d = 0.005" * 92^((36-AWG)/39)
This is based on #36 wire being 0.005" and #0000 (treat as -3) being 0.46". There are 39 steps in a 92:1 ratio.
Note that 20 steps 92^(20/29) = 10.164 (~10), and
6 steps, 92^(6/39) = 2.005 (~2).
These are useful to do in your head, but are not an exact fit, and WRONG formulas also appear on the web based on powers of 2 or 10.
For efficient computation, this can be reduced to
d = b*e^(-an)
where n = AWG number, 00 = -1, 000 = -2, etc
b = 0.46 inch * 92^(-1/13) (about 0.32486")
a = (ln92)/39 (about 0.11594)
in mm, multiply b by 25.4 mm/inch
http://www.powerstream.com/Wire_Size.htm
The formula is
d = 0.005" * 92^((36-AWG)/39)
This is based on #36 wire being 0.005" and #0000 (treat as -3) being 0.46". There are 39 steps in a 92:1 ratio.
Note that 20 steps 92^(20/29) = 10.164 (~10), and
6 steps, 92^(6/39) = 2.005 (~2).
These are useful to do in your head, but are not an exact fit, and WRONG formulas also appear on the web based on powers of 2 or 10.
For efficient computation, this can be reduced to
d = b*e^(-an)
where n = AWG number, 00 = -1, 000 = -2, etc
b = 0.46 inch * 92^(-1/13) (about 0.32486")
a = (ln92)/39 (about 0.11594)
in mm, multiply b by 25.4 mm/inch
- Guest
Gauges to mm or inches
by 1CH1 » Mon Aug 07, 2006 5:52 am
According to this article, http://www.ncbi.nlm.nih.gov/entrez/quer ... t=Abstract , the system being used is 'Birmingham'. This article appears incorrect in their approximation of equivalence, since the steps in gauge correspond more closely to 0.01 inches, not 0.001. This is mostly an intuitive response, but I can visually discriminate between 18 and 22 gauge needles, which might correspond to ~.04 inches, but certainly not ~0.004 inches (this is in the thousanths!!)
Here is a list of BWG equivalents: http://www.sigmaaldrich.com/Area_of_Int ... Chart.html
The numbers are indeed non-linear, and thus the above (AWG) exponential equation is probably a good model for the Birmingham numbers.
Here is a list of BWG equivalents: http://www.sigmaaldrich.com/Area_of_Int ... Chart.html
The numbers are indeed non-linear, and thus the above (AWG) exponential equation is probably a good model for the Birmingham numbers.
- 1CH1
- Posts: 2
- Joined: Mon Aug 07, 2006 5:19 am
- Location: SF, CA, USA
- northern
Re: conversion
by Dirtman » Tue Jul 07, 2009 7:54 am
northern wrote:i am looking to convert 0.001 to gauge? any help
There are different gauges, which one?
- Dirtman
- Expert
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- Joined: Sat Jan 21, 2006 2:04 pm
- Location: California
Re: conversion
by Guest » Mon Nov 29, 2010 6:47 pm
Dirtman wrote:northern wrote:i am looking to convert 0.001 to gauge? any help
There are different gauges, which one?
if it is Birmingham Gauge, you may try this one; I tried getting this approximate expression using linear regression of a log function
Gauge to mm
Y (mm) = 10.105 * E^(-0.116 X); where X is value in Gauge
mm to Gauge
X = [ln (10.105 / Y)] / 0.116; Round off X to the nearest whole number
- Guest
More info
8 posts
• Page 1 of 1