PCB Coplanar Strips Calculator

Our free impedance calculator for coplanar strips can help you with your design features to ensure your PCB is a working as you intend. Instructions are below the calculator and don’t forget we can make and test your controlled impedance printed circuit board too. 

Don’t forget to check out our other calculators on our site and also our material search tool. If your struggling to find the correct results, perhaps switching to a different substrate might help? Click the red (left) button below to search through a database of over 300 different substrates to find the one with the correct DK value.

More information on controlled impedance can be found here.

Coplanar Strips Calculator


w[mm] > Zo[ohm]
Zo [ohm] > w [mm]

er eff k lambda/4 [mm]

[ How to use ]
1. Input the parameter of the circuit board and center frequency.
(1) When the characteristic impedance (Zo) of the line width (w) is calculated.
Input w, and click on [ Analyze ] button.
(2) When the line width (w) of the characteristic impedance (Zo) is calculated.
Input Zo, and click on [ Synthesis ] button.
3. A calculation result is indicated.

This tool should only be used as a guide. Always check your calculations with a professional system.