When manufacturing POS (Point of Sale) kiosks and payment terminals, selecting the right steel sheet thickness is one of the most critical decisions affecting product quality, durability, and cost. The thickness range of 1mm to 5mm covers the vast majority of applications in this industry, from lightweight indoor terminals to heavy-duty outdoor payment stations.
Understanding Gauge vs. Millimeter Measurements
In the sheet metal industry, thickness is commonly expressed in both gauge numbers and millimeters. This dual measurement system can be confusing for new exporters, but understanding the conversion is essential for communicating with international buyers on Alibaba.com. The gauge system is primarily used in North America, while millimeters are the standard in Europe, Asia, and most international trade contexts.
Steel Sheet Thickness Conversion Chart (Standard Gauge to Millimeter)
| Gauge | Steel Thickness (mm) | Stainless Steel (mm) | Aluminum (mm) | Typical Application |
|---|---|---|---|---|
| 18 gauge | 1.21 mm | 1.27 mm | 1.02 mm | Light indoor kiosks, decorative panels |
| 16 gauge | 1.52 mm | 1.59 mm | 1.29 mm | Standard indoor POS terminals |
| 14 gauge | 1.90 mm | 1.98 mm | 1.63 mm | Heavy-duty indoor kiosks |
| 12 gauge | 2.66 mm | 2.77 mm | 2.05 mm | Outdoor payment stations |
| 11 gauge | 3.04 mm | 3.18 mm | 2.30 mm | High-security enclosures |
| 10 gauge | 3.42 mm | 3.57 mm | 2.58 mm | Industrial-grade kiosks |
| 9 gauge | 3.80 mm | 3.96 mm | 2.90 mm | Specialized heavy-duty applications |
| 8 gauge | 4.18 mm | 4.37 mm | 3.23 mm | Maximum security installations |
| 7 gauge | 4.55 mm | 4.78 mm | 3.60 mm | Custom industrial projects |
Why 1mm-5mm is the Sweet Spot for POS Kiosk Manufacturing
The 1mm to 5mm thickness range represents the optimal balance between structural integrity, weight, and cost for most POS kiosk applications. Thickness below 1mm (such as 20-22 gauge) lacks the rigidity needed for freestanding kiosks and is more suitable for decorative panels or internal components. Conversely, thickness above 5mm becomes unnecessarily heavy and expensive for typical kiosk applications, though it may be justified for high-security or extreme environment installations.
For sheet metal kiosks, we recommend using material between 18 and 12 gauge. This thickness range balances structural integrity with weight considerations, ensuring the kiosk is sturdy enough for its intended use without being unnecessarily heavy or difficult to install [2].

