Light packaging film thickness.
Plastic Gauge to Mil Converter
Convert plastic film gauge to mils, microns, millimeters, and inches. Useful for poly bags, pallet wrap, shrink film, greenhouse film, drop cloths, and packaging specs.
Convert plastic thickness
Enter a film thickness in gauge, mils, microns, millimeters, or inches. Results update instantly.
100 gauge equals 1 mil, 25.4 microns, 0.0254 mm, and 0.001 inch.
Compare two film thicknesses
Quickly see how much thicker one plastic film is than another.
200 gauge is 2× as thick as 100 gauge
Compare material type and strength too, not thickness alone.
Quick answer: 100 gauge plastic thickness
100 gauge plastic is 1 mil thick. It also equals 0.001 inch, 25.4 microns, or 0.0254 mm. In packaging, that is a light film thickness often seen in bags, liners, and protective covers.
Plastic gauge conversion formula
For plastic film thickness, 100 gauge equals 1 mil. A mil is one thousandth of an inch.
- mils = plastic gauge ÷ 100
- microns = plastic gauge × 0.254
- mm = plastic gauge × 0.000254
Important: this is for plastic film gauge
This converter is for packaging and plastic film gauge. It is not for wire gauge, sheet metal gauge, shotgun gauge, or jewelry gauge, because those systems use different scales.
If a product page lists both gauge and mils, use the listed manufacturer thickness when available. Additives, resin type, embossing, and reinforcement can change how strong the film feels.
Plastic gauge to mil chart
| Plastic gauge | Mils | Microns | Millimeters | Common note |
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Plastic gauge to mil FAQ
How thick is 50 gauge plastic?
50 gauge plastic is 0.5 mil, about 12.7 microns, or 0.0127 mm thick.
How thick is 100 gauge plastic?
100 gauge plastic is 1 mil, 25.4 microns, 0.0254 mm, or 0.001 inch thick.
How thick is 400 gauge plastic?
400 gauge plastic is 4 mil, about 101.6 microns, 0.1016 mm, or 0.004 inch thick.
Is a higher plastic gauge thicker?
Yes. In plastic film gauge, a higher number means a thicker film. 200 gauge is twice as thick as 100 gauge.