Free PCB Engineering Tools

Power & Current

PCB Trace Width Calculator

Size trace width for current, voltage drop, and power loss (IPC-2221).

Calculate Trace Width

Signal Integrity

PCB Impedance Calculator

Solve single-ended and differential impedance from your stackup.

Calculate PCB Impedance

Component

5-Band Resistor Color Code

Decode resistance and tolerance from 5-band color codes.

Decode Resistor Color Code

Power & Current

PCB Via Current Calculator

Check via current capacity to avoid thermal failure.

Calculate Via Current

Parasitics

Via Parasitic Capacitance

Estimate via parasitic capacitance for high-speed signal paths.

Calculate Via Capacitance

Parasitics

Via Parasitic Inductance

Calculate via inductance for signal integrity and decoupling.

Calculate Via Inductance

Signal Integrity

Microstrip Impedance

Get characteristic impedance for surface microstrip routing.

Calculate Microstrip Impedance

Signal Integrity

Stripline Calculator

Determine impedance for internal stripline between reference planes.

Calculate Stripline Impedance

Signal Integrity

Diff. Microstrip Impedance

Differential pair impedance for USB, HDMI, and DDR designs.

Calculate Differential Impedance

RF & High-Freq

Coplanar Waveguide

Size Grounded Coplanar Waveguides (GCPW) for RF designs.

Calculate Coplanar Waveguide

RF & High-Freq

Skin Effect Depth

Find copper skin depth for high-frequency AC resistance.

Calculate Skin Effect Depth

Thermal

IC Thermal Area Calculator

Estimate copper pour area needed to heatsink an IC.

Calculate Thermal Copper Area