Calculator for Required Trace Width

Required Trace Width for conductors Calculations are exact according to IPC-2221. No liabilities are assumed for correctness.


Results for Internal Layers

Results for External Layers in Air

​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.