StriplineCalculate stripline impedance for given PCB parameters.
Comparisons show minimal differences to ADS linecalc and Polar Instruments Quicksolver industry standard tools.
PCB vendors can use controlled impedances and will vary any designated trace width at mask level to hit impedance targets. For this reason, always err on the low impedance side so that vendor only makes trace width reductions thereby minimising potential layout infringements.
1/2 oz. copper is approximately 17 um thick.
Equations from Brian C. Wadell, “Transmission Line Design Handbook”