Calculates the impedance of a microstrip.
This calculator takes trace thickness into account and is not limited to a range of w / h ratios.
Units do not matter as long as they are consistent - use the same units for w, h, and t.
See Wheeler for equation.

w

h

t

ε

Z

Ω

Material

ε

Teflon

2

Polyimide

3

FR4

4.5

Rogers 4003

3.38

PTFE

2.6

GETEK

3.8 - 4.2

Nelco 4000-8000

3.5 - 4.4

Copper Thickness t (mils)

Copper Thickness(Ounce)

2.8

2 oz.

1.4

1 oz.

0.7

1/2 oz.

0.35

1/4 oz.

Differential Impedance Calculator

Calculates the differential impedance of a microstrip pair. Z_{o} is the impedance of an individual trace.
Units do not matter as long as they are consistent.