| Gauge (GA) | Thickness (mm) | Thickness (inch) |
|---|---|---|
| 7 | 4.76 | 0.1875 |
| 8 | 4.19 | 0.1644 |
| 9 | 3.76 | 0.1483 |
| 10 | 3.42 | 0.1345 |
| 11 | 3.05 | 0.1200 |
| 12 | 2.78 | 0.1094 |
| 14 | 1.98 | 0.0785 |
| 16 | 1.59 | 0.0625 |
| 18 | 1.27 | 0.0500 |
| 20 | 0.95 | 0.0375 |
| 22 | 0.79 | 0.0313 |
| 24 | 0.63 | 0.0250 |
| 26 | 0.48 | 0.0187 |
| 28 | 0.38 | 0.0150 |
| 30 | 0.32 | 0.0125 |
Standard Steel Gauge Size Chart
(U.S. Standard Gauge – ASTM A569, A366, A36, A653, A1011, etc.)
| Gauge (GA) | Thickness (mm) | Thickness (inch) | Weight (kg/m²) |
|---|---|---|---|
| 1 | 7.62 | 0.3000 | 59.92 |
| 2 | 6.35 | 0.2500 | 49.93 |
| 3 | 5.72 | 0.2250 | 44.93 |
| 4 | 5.21 | 0.2043 | 40.92 |
| 5 | 4.62 | 0.1819 | 36.32 |
| 6 | 4.17 | 0.1644 | 32.76 |
| 7 | 3.66 | 0.1443 | 28.72 |
| 8 | 3.26 | 0.1285 | 25.60 |
| 9 | 2.91 | 0.1144 | 22.81 |
| 10 | 2.59 | 0.1019 | 20.23 |
| 11 | 2.31 | 0.0907 | 18.00 |
| 12 | 2.06 | 0.0785 | 15.72 |
| 14 | 1.63 | 0.0641 | 12.74 |
| 16 | 1.29 | 0.0508 | 10.07 |
| 18 | 1.02 | 0.0403 | 7.98 |
| 20 | 0.81 | 0.0319 | 6.36 |
| 22 | 0.64 | 0.0253 | 5.06 |
| 24 | 0.51 | 0.0201 | 4.06 |
| 26 | 0.40 | 0.0159 | 3.20 |
| 28 | 0.32 | 0.0126 | 2.54 |
| 30 | 0.25 | 0.0100 | 1.98 |
| 32 | 0.20 | 0.0079 | 1.58 |
| 34 | 0.16 | 0.0063 | 1.27 |
| 36 | 0.13 | 0.0050 | 1.02 |
Galvanized Steel Gauge Chart (ASTM A653 Standard)
| Gauge (GA) | Thickness (inch) | Thickness (mm) | Weight (kg/m²) |
|---|---|---|---|
| 7 | 0.1793 | 4.55 | 35.60 |
| 8 | 0.1644 | 4.18 | 32.60 |
| 9 | 0.1495 | 3.80 | 29.60 |
| 10 | 0.1345 | 3.42 | 26.60 |
| 11 | 0.1196 | 3.04 | 23.60 |
| 12 | 0.1046 | 2.66 | 20.60 |
| 14 | 0.0747 | 1.90 | 14.70 |
| 16 | 0.0598 | 1.52 | 11.70 |
| 18 | 0.0478 | 1.21 | 9.30 |
| 20 | 0.0359 | 0.91 | 7.00 |
| 22 | 0.0299 | 0.76 | 5.80 |
| 24 | 0.0239 | 0.61 | 4.60 |
| 26 | 0.0179 | 0.45 | 3.40 |
| 28 | 0.0149 | 0.38 | 2.90 |
| 30 | 0.0120 | 0.30 | 2.30 |
Aluminum Gauge Chart (ASTM B209 Standard)
| Gauge (GA) | Thickness (inch) | Thickness (mm) | Weight (kg/m²) |
|---|---|---|---|
| 7 | 0.1443 | 3.67 | 19.78 |
| 8 | 0.1285 | 3.26 | 17.61 |
| 9 | 0.1144 | 2.91 | 15.64 |
| 10 | 0.1019 | 2.59 | 13.93 |
| 11 | 0.0907 | 2.30 | 12.41 |
| 12 | 0.0808 | 2.05 | 11.07 |
| 14 | 0.0641 | 1.63 | 8.78 |
| 16 | 0.0508 | 1.29 | 6.96 |
| 18 | 0.0403 | 1.02 | 5.52 |
| 20 | 0.0319 | 0.81 | 4.36 |
| 22 | 0.0253 | 0.64 | 3.46 |
| 24 | 0.0201 | 0.51 | 2.75 |
| 26 | 0.0159 | 0.40 | 2.18 |
| 28 | 0.0126 | 0.32 | 1.73 |
| 30 | 0.0100 | 0.25 | 1.38 |
| 32 | 0.0079 | 0.20 | 1.09 |
| 34 | 0.0063 | 0.16 | 0.87 |
| 36 | 0.0050 | 0.13 | 0.69 |
Complete Guide to Metal Gauge Thickness and Weight Calculations
Understanding gauge size and thickness is essential when working with different metals for construction, manufacturing, and industrial applications. The Gauge Size Chart on this page provides a comprehensive overview of the most commonly used materials, including stainless steel, galvanized steel, standard steel, and aluminum.
Whether you’re a metal fabricator, engineer, or DIY enthusiast, having a clear understanding of gauge numbers and their corresponding thickness is crucial for accurate project planning and material selection.
What is a Gauge Size?
Gauge size refers to the thickness of a metal sheet. The higher the gauge number, the thinner the material, with lower gauge numbers indicating thicker sheets. However, the gauge system differs by metal type, which is why it’s important to refer to the correct chart for each material. For example, a 12 gauge stainless steel sheet is thicker than a 12 gauge aluminum sheet, due to the different densities of the materials.
Metal Gauge Thickness Charts and Weight Calculation
The Gauge Size Chart provided on this page covers various metals and their thickness measurements in inches, millimeters (mm), and weight per square meter (kg/m²). This is especially useful when you need to determine the amount of material required for a particular project.
Each material is standardized under ASTM specifications:
- Stainless Steel Gauge Size Chart: This chart follows ASTM standards for stainless steel sheets and plates, commonly used for applications like construction, aerospace, and food industries.
- Standard Steel Gauge Size Chart: Commonly used in general construction, automotive, and manufacturing industries, this chart covers regular carbon steel.
- Galvanized Steel Gauge Chart: Galvanized steel is coated with a layer of zinc for added corrosion resistance, making it ideal for roofing, ductwork, and outdoor applications.
- Aluminum Gauge Chart: Lightweight and corrosion-resistant, aluminum is commonly used in the aerospace industry, transportation, and building materials.
Calculating Metal Weight
To calculate the weight of a metal sheet, use the formula:
For example, if you’re working with a 1mm thick stainless steel sheet that is 1 meter by 1 meter, the weight would be:
Where 7.85 g/cm³ is the typical density of stainless steel.
Applications of Different Metal Gauges
- Stainless Steel (12-24 Gauge): Known for its strength and corrosion resistance, stainless steel is widely used in industries like food processing, chemical manufacturing, and architecture.
- Galvanized Steel (14-22 Gauge): Ideal for outdoor applications due to its corrosion resistance, galvanized steel is used for roofing, HVAC systems, and automotive parts.
- Aluminum (14-24 Gauge): Lightweight and non-corrosive, aluminum is ideal for applications in aerospace, electronics, and transportation.
- Standard Steel (7-12 Gauge): Often used in structural applications such as beams, support frames, and industrial equipment.
Why Understanding Metal Gauge is Important?
Knowing the correct gauge size for a material ensures that you select the right thickness for your project. Whether you are designing a metal structure, fabricating parts, or creating custom equipment, using the proper gauge thickness guarantees that your product will meet strength, durability, and safety requirements.
Optimize Your Metal Projects with Accurate Gauge Charts
For any construction, manufacturing, or industrial project, it’s crucial to select the correct material gauge. Accurate metal gauge charts like the ones provided here ensure that your work meets quality standards and avoids errors in material selection. If you’re looking for more detailed charts or specific material data, make sure to check back for updates or consult additional resources.