Electronics

PCB trace width calculator

This calculator is derived from this one. I improved the user interface and rewrote the calculation module, because on the other site I got some erroneous results, in particular concerning the additional parameters (resistance, voltage and power).

PCB trace width calculator

Choose Type

External Trace

Internal Trace

Maximum current

I

mA A

Copper thickness

Th

oz/ft^2 mils um mm

Temperature rise

T_rise

10 °C 20 °C 30 °C 45 °C 60 °C 75 °C 100 °C

10 °C 20 °C 30 °C 45 °C

Trace width

W

mils um mm

Ambient temperature

T_amb

°C °F

Trace length

L

mm cm inch

Trace temperature

T_trace

Resistance

R

Voltage drop

V

Power dissipation

P

Disclaimer: despite been tested thoroughly this calculator comes without guarantee. Use at your own risk. If you would find errors, please let me know, and include the parameters used and the results you got.