worker using conversion table

Gauge to Micron and Millimetre Conversion Guide

In various industries, ranging from manufacturing to packaging, understanding and being able to convert different units of measurement for material thickness is essential - common units used for this purpose are gauge, micron, and millimetre. Whether you're dealing with polythene films or other materials, having a reliable conversion guide can streamline processes and ensure accuracy in measurements. 

Converting Measurements Using a Conversion Table

Polythene gauge (ga) can be converted to micron (mu) by dividing it by 4, and the thickness in millimetres (mm) can be determined by dividing the micron value by 1000. An example of this would be 50mu equalling 200ga, which is equivalent to 0.05mm. 

The thickness of your polythene can range from ultra-light (typically between 32-50ga) to super heavy (1000-1200ga), so it is important to make accurate calculations.

Our conversion table below states how each measurement converts to another, enabling you to make informed decisions and perform accurate measurements with confidence.

Gauge (ga)MilInch (in)Micron (mu)Millimetre (mm)Centimetre (cm)
30 .30 .0003 7.6 .0076 .000762
40 .40 .0004 10 .0101 .001016
50 .50 .0005 12.5 .0127 .00127
60 .60 .0006 15 .0152 .001524
75 .75 .0007 19 .0190 .001905
80 .80 .0008 20 .0203 .002032
90 .90 .0009 23 .0228 .002286
100 1.0 .0010 25 .0254 .00254
120 1.2 .0012 30 .0304 .003048
150 1.5 .0015 38 .0380 .00381
160 1.6 .0016 40 .0406 .004064
180 1.8 .0018 45 .0457 .004572
200 2.0 .0020 50 .0508 .00508

Where Might These Measurements Be Used?

Micron and gauge measurements are used to determine the thickness of materials in a number of different industries, whereas millimetres, metres and inches are used more commonly in everyday life.

Micron and gauge measurements are extensively used in the packaging industry to determine the thickness of materials such as plastic films, shrink wraps, and packaging foils. These measurements are crucial for ensuring the durability and protection of packaged goods. 

Micron and gauge measurements are also used in the manufacturing industry, to specify the thickness of materials such as metal sheets, rubber, textiles, and various types of films.

Why Is It Important to Measure the Correct Thickness?

In the packaging industry, accurate conversions are important for ensuring that the quality of your packaging is up to standard. If the thickness of your film falls below the correct specifications, this can lead to packaging failures, such as splitting, bursting or leaking, meaning it is less effective at protecting goods. Also, plastic packaging materials that do not meet the correct thickness specifications (for example, material that is stretched too thin during the packaging production process) can be less effective at blocking oxygen and other contaminants, potentially causing rapid product degradation.

Polythene Packaging Manufactured to Your Requirements & Needs

Industrial Polythene is a leading supplier of bespoke polythene packaging products. We have 50 years of experience within this industry and can supply polythene products manufactured to your individual needs. Contact us for a chat or request a free sample today.


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