According to IPC-2221, the formulas used for calculation are exact within the following limits:
- Amperage up to 35 ampere
- Trace width up to 10 millimeter
- Temperature increases from 10 to 100 degrees Celsius
- Copper from 18 to 105 micrometers
For other values, this calculator only provides an estimate.
The material has no effect on the calculation of the required trace width.