Gauge (Thickness) to inches

Disscussing old, rare, very specific or otherwise uncommon units and measurements
Forum rules
Dear convert-me.com forum visitors,

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

Thank you for being with us and sorry for any inconveniences this could caused.

Gauge (Thickness) to inches

Postby 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

Postby Knight » Fri Feb 06, 2004 8:19 pm

Mark wrote:I need the formula to convert (wire) gague to inches! I knew it once, but well, it must be old age!
A good reference is at http://www.sizes.com/materls/wire.htm
Knight
Expert
 
Posts: 309
Joined: Tue Jan 13, 2004 9:43 pm
Location: Los Alamos, NM

Postby Guest » Thu Apr 14, 2005 6:11 pm

That's useless to me and impossible to understand. Sigh.
Guest
 

Postby 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
Guest
 

Gauges to mm or inches

Postby 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.
1CH1
 
Posts: 2
Joined: Mon Aug 07, 2006 5:19 am
Location: SF, CA, USA

conversion

Postby northern » Tue Jul 07, 2009 3:24 am

i am looking to convert 0.001 to gauge? any help
northern
 

Re: conversion

Postby 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
 
Posts: 574
Joined: Sat Jan 21, 2006 2:04 pm
Location: California

Re: conversion

Postby 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

  • List of all units you can convert online
  • Metric conversion
  • Convert pounds to gallons
  • Convert grams to cups
  • Grams to milliliters
  • Imperial vs US Customary
  • History of measurement
  • Return to Exotic units



    Our Privacy Policy       Cooking Measures Converter       Metric conversions

    cron