Microstrip Width Calculator and Formula

This page provides a Microstrip Width Calculator and explains the formula used.

Figure 1: Microstrip Line

(Refer to types of microstrip lines and basics of microstrip lines for more information.)

Microstrip Width Calculator and Example

Let’s look at an example calculation.

Inputs:

• Relative dielectric permittivity (ε_r) = 3.4
• h (substrate height) = 4.25 mils
• t (conductor thickness) = 1.25 mils
• Impedance (Z₀) = 50 Ohm

Output:

• Width (W) = 7.44 mils

(Note: Use 1 mm = 39.37 mils, or use a mm to mils converter, as shown below)

mm to mils Conversion Example

INPUT:

• mm = 0.5

OUTPUT:

• mils = 19.685

Microstrip Width Formula

The following equation is used for the Microstrip Width Calculator: