Being in the sheet metal fabrication world means working with people from all over. Whether it’s the US or overseas, working with companies from different countries means knowing the different fabrication standards that others are accustomed to. This includes being aware of the measurement system that is used. Many times dimensional prints will show the dimensions in either imperial/US or metric. Being aware of the different measurement systems will save you from havoc of manufacturing parts to the inappropriate dimension. Which is why it is so important to know how to convert dimensions of parts. So to save some time, we have created this blog post as your Go-To For Measurement Conversions. So be sure to bookmark this page for future use.
INCHES |
METRIC |
|
FRACTIONAL | DECIMAL | MILLIMETER |
1/8 | .125 | 3.17 |
3/16 | .1875 | 4.7625 |
1/4 | .25 | 6.35 |
5/16 | .3125 | 7.9375 |
3/8 | .375 | 9.525 |
7/16 | .4375 | 11.1125 |
1/2 | .5 | 12.7 |
9/16 | .5625 | 14.2875 |
5/8 | .625 | 15.8750 |
11/16 | .6875 | 17.4625 |
3/4 | .75 | 19.05 |
13/16 | .8125 | 20.6375 |
7/8 | .875 | 22.225 |
15/16 | .9375 | 23.8125 |
Here you will not only find the conversions for common fractions to decimals in inches and millimeters, but you will also find the conversions for steel gauges*.
GAGE NO. (Galv. Steel) |
THICKNESS (INCHES) |
|
DECIMAL EQUIV. | TOLERANCE | |
10 | .1382 | ± .009 |
11 | .1233 | ± .009 |
12 | .1084 | ± .009 |
13 | .0934 | ± .008 |
14 | .0785 | ± .008 |
15 | .0710 | ± .006 |
16 | .0635 | ± .006 |
17 | .0575 | ± .005 |
18 | .0516 | ± .005 |
19 | .0456 | ± .005 |
20 | .0396 | ± .004 |
21 | .0366 | ± .004 |
22 | .0336 | ± .004 |
23 | .0306 | ± .004 |
24 | .0276 | ± .004 |
25 | .0247 | ± .004 |
26 | .0217 | ± .003 |
27 | .0202 | ± .003 |
28 | .0187 | ± .003 |
29 | .0172 | ± .003 |
30 | .0157 | ± .003 |
*Gauge conversions are for steel material only. By standard, aluminum material does not use gauge, but decimals for material thicknesses.