Electrical / Electronics

PCB trace width and current

Estimates required width or approximate current of a PCB trace with an older simplified empirical model.

Related calculators

Calculates resistance of a simple PCB trace from resistivity, length, width and copper thickness.

Calculates resistance of a uniform conductor from resistivity, length, and cross-sectional area.

Calculates DC power from voltage and resistance.

Calculates branch currents in an ideal two-resistor current divider.

Calculates diode power loss from constant forward voltage and average current or conduction current with duty cycle.

Calculates resistance and resistor power for an LED current limiting resistor.

A_{mil2} = {(\frac{I}{(k_{layer} \cdot {ΔT}^{0.44})})}^{(\frac{1}{0.725})}

width = \frac{A}{thickness}