Coplanar and non-coplanar Impedance calculator

Dear JLCPCB,

I am using your online Impedance calculator but still have some confusion:

- My application involves a standard 2-layer PCB with 1.6mm thickness and 1 oz copper.

- I always use a ground copper pour on both sides.

- I need to design a transmission line and am unsure about the trace width I should use for 50 ohms impedance:

 - For a coplanar single-ended trace with a line-to-copper distance of 30 mils, the required trace width is 83 mils.

 - For a non-coplanar single-ended trace, the required trace width is 107 mils.

Thank you,

Mula