Have you imagined why 20gauge is thinner than 16gauge in metal but opposite in plastic film?

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How thick is 16 gauge steel 

For metal thickness calculation, it’s very confusing to many people that steel sheet thickness is measured using a method that appears counter-intuitive. As regular measurements increase in number, so does weight and thickness. 

In fact, not right in metal thickness calculation! The thickness of the metal sheet stock is measured in Gauge, and Gauge refers back to a system in which the physical measurement properties decrease as the rating number increases.

But the gauge measuring system is the opposite in flexible plastic measurement. When we do the flexible plastic thickness measurements, the physical number increases with an increase in thickness.

Fun-Fact – how thick is 16 gauge steel

It’s excellent information! Few people understand why steel or metal thickness decreases as the gauge increases (i.e., 16 gauge thickness Mild Steel sheet is higher thickness than 20 gauge steel). 

Explanation of 16 gauge steel thickness: The story comes from the early evolution of a steel gauge determination method that used the specific measurement on a 1″ thick steel plate. 

The 1″ thickness of the metal(Steel) was measured in reducing fractions number such as 1/14″ thick, 1/16″ thick, 1/20″ thick, and so on. The below number became an easy identifier and eventually was adopted as the “gauge number.” 

Thus, 1/16″ shifted 16 gauge, and 1/20″ shifted 20 gauge. The thought makes sense, but without explanation, the converse number is usually confusing by taking the gauge number and turning it to a fractional format.

Let also understand the gauge theory explanation for the calculation of flexible plastic thickness.

When it comes to applying plastic or material, thickness comes into consideration. To find a way to convert plastic flexible film thickness gauge having the relationship between Mil, mm, and gauge unit, check out the plastic gauge thickness chart and calculation formula.

So, what is Plastic Gauge Thickness?

The plastic film thickness is frequently described as Gauge, or calculated in Mil unit, equivalent to a thousand an inch. Other ways to express plastic thickness are including Micron and mm(Millimeter) unit. 

It displays the plastic materials thickness correctly in any place and time; there is a plastic gauge thickness chart to help you move among these units. 

For newcomers to design and make, lots of plastic measurement variations may be confusing; the conversion chart can ensure they find the material’s proper thickness.

Plastic Gauge Thickness Chart – Plastic Film/Sheet Thickness Gauge Conversion

The conversion relationship between these thickness units is: a Mil is 1000 times an inch, the Gauge is (100) x (Mils). To go from Mils to Microns, it needs to multiply mils x 25.4. 

So the calculation formulas for plastic Gauge are as below.

Mil = 1000 x Inch

Micron = Mil x 25.4

Micron = Gauge x 0.254

Gauge = 100 x Mil

Gauge = Micron x 3.937

GaugeMilMicronMillimeterInch
300.307.6200.00760.0003
350.358.8900.00890.0004
400.4010.1600.01020.0004
450.4511.4300.01140.0005
500.5012.7000.01270.0005
550.5513.9700.01400.0006
600.6015.2400.01520.0006
650.6516.5100.01650.0007
700.7017.7800.01780.0007
750.7519.0500.01910.0008
800.8020.3200.02030.0008
850.8521.5900.02160.0009
900.9022.8600.02290.0009
950.9524.1300.02410.0010
1001.0025.4000.02540.0010
1101.1027.9400.02790.0011
1201.2030.4800.03050.0012
1301.3033.0200.03300.0013
1401.4035.5600.03560.0014
1501.5038.1000.03810.0015
1601.6040.6400.04060.0016
1701.7043.1800.04320.0017
1801.8045.7200.04570.0018
1901.9048.2600.04830.0019
2002.0050.8000.05080.0020
2102.1053.3400.05330.0021
2202.2055.8800.05590.0022
2302.3058.4200.05840.0023
2402.4060.9600.06100.0024
2502.5063.5000.06350.0025
2602.6066.0400.06600.0026
2702.7068.5800.06860.0027
2802.8071.1200.07110.0028
2902.9073.6600.07370.0029
3003.0076.2000.07620.0030

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