Track Width Reference Table

Track Width Reference Table (for 10deg C temp rise).
Track Width is in Thous (mils)
Current (Amps) - Width for 1oz - Width for 2 oz - milli Ohms/Inch
1 - 10 - 5 - 52
2 - 30 - 15 - 17.2
3 - 50 - 25 - 10.3
4 - 80 - 40 - 6.4
5 - 110 - 55 - 4.7
6 - 150 - 75 - 3.4
7 - 180 - 90 - 2.9
8 - 220 - 110 - 2.3
9 - 260 - 130 - 2.0
10 - 300 - 150 - 1.7

As a start, you may like to use say 25 thou for signal tracks, 50 thou for power
and ground tracks, and 10-15 thou for going between IC and component pads.
Some designers though like the “look” of smaller signal tracks like 10 or 15 thou,
while others like all of their tracks to be big and “chunky”. Good design practice
is to keep tracks as big as possible, and then to change to a thinner track only
when required to meet clearance requirements.

The thickness of the copper on the PCB is nominally specified in ounces per
square foot, with 1oz copper being the most common. You can order other
thicknesses like 0.5oz, 2oz and 4oz. The thicker copper layers are useful for high
current, high reliability designs.


PCB Design Tutorial by David L. Jones

PCB Track Width Calculator
PCB Track Width Calculator
This page calculates approximations to the
ANSI/IPC-D-275 and IPC-2221 design standards for PCB trace width. www.desmith.com/NMdS/Electronics/TraceWidth.html

The PCB Track Width Calculator
The PCB Company - Supplier of Printed Circuit Boards.
www.pcbco.com.au/tracecalc.html

PCB Trace Width Calculator
QUESTION: Very cool PCB width tool! I would like to know its limits though.
I entered a 65 amp current requirement and it returned a track width that must
www.geocities.com/capecanaveral/lab/9643/TraceWidth.htm