Скачать или смотреть 82 Track width Calculator KiCad Trace Width & Current Capacity Calculator

Here's a clear, step-by-step guide on how to use the Track Width Calculator tool in KiCad (also known as the PCB Trace Width Calculator):

? How to Use KiCad's Track Width Calculator

1. Open KiCad

Launch your KiCad project and open the PCB Editor (.kicad_pcb file).

2. Access the Calculator

From the KiCad main window, go to:

Tools → Calculator

OR

If you're already in the PCB Editor, go to:

Tools → Electrical Rules Checker → Track Width Calculator

OR launch the calculator directly:

Tools → Track Width Calculator

3. Choose the Calculation Type

The calculator supports both internal and external layers. Select the appropriate one depending on your PCB layer stack.

4. Enter Your Parameters

Fill in the following key values:

Current (A): The amount of current the trace needs to carry.

Temperature Rise (°C): The acceptable temperature rise due to current flow (typically 10°C is standard).

Copper Thickness (oz/ft² or mm): Common values:

1 oz = 35 µm

2 oz = 70 µm

Ambient Temperature (optional)

5. Calculate the Width

Click the “Calculate” button.

The tool will output the minimum required track width in mm or mils.

You can also see the resistance and voltage drop across the trace.

6. Apply the Width in PCB Layout

Use the calculated track width when routing traces.

In the PCB Editor, set the trace width by selecting the appropriate net class or using manual track width settings.

✅ Tips

Follow IPC-2221 standards for general-purpose PCBs.

For high-current or high-frequency designs, consider using external simulators or field solvers for more accurate modeling.

Use wider tracks than the minimum when space permits for better thermal and electrical performance.