Internal PCB Trace Width

Calculate the required internal trace width for a specified current

Trace Width Calculator

Choose Type

External Trace

Internal Trace

Stripline Trace Width Calculator

Inputs

Max Current

I

A mA uA

Trace Width Unit

W

mil cm mm um inch

Trace Thickness

T

oz/ft^2 mil cm mm um inch

Temperature Rise

Trise

10 ° C 20 ° C 30 ° C 45 ° C

Additional Inputs

Ambient Temperature

Tamb

° C ° K ° F

Length

L

mil cm mm um inch

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