Reference Designer Tables
Copper oz to mils Table
The PCB Designers specify the copper plating weight in oz. The copper in a PCB is rated in ounces, and represents the thickness of 1 ounce of copper rolled out to an area of 1 square foot. For example a PCB that uses 1 oz. copper has a thickness of 1.4mils. This Tables converts Cu Oz to mils.
Following is the formula for oz to mils conversion.
Thickness(cpw) in mils = 1.37 * cpw (in oz)
Following is the formula thickness ( in mils) to cpw( in oz) conversion.
cpw(t) in oz = t (in mils)/1.37
| Thickness in oz | in Mils |
|---|---|
| 1/2 | 0.7 |
| 1 | 1.4 |
| 1.5 | 2.1 |
| 2 | 2.8 |
| 2.5 | 3.5 |
| 3 | 4.2 |