External PCB Trace Width

Calculate the required trace width for a specified current

Trace Width Calculator

Microstrip Trace Width Calculator

microstrip impedance diagram

Inputs

Max Current
I
Trace Width Unit
W
Trace Thickness
T
Temperature Rise
Trise

Additional Inputs

Ambient Temperature
Tamb
Length
L

Output

Trace Width: 
 

Additional Output

Trace Temperature: 
 
Resistance: 
 
Voltage Drop: 
 
Power Dissipation: 
 
 

Tool Description

Trace width is a requirement that designers specify to ensure that the trace can handle the required current capacity. This tool calculates the trace width based upon the following design specifications:

  • Max Current
  • Trace Thickness
  • Max Desired Temperature Rise

This tool also calculates the following additional valuable information related to the trace:

  • Resistance
  • Votlage Drop
  • Trace Power Dissipation

After a user specifies the max current, trace thickness, and desired max temperature rise, the tool calculates the trace width. This tool is based on charts in IPC-2221

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