PCB Impedance Tables
Trace width and gap for 50, 90 and 100 ohm across dielectric height, Dk and copper weight, computed by a field solver, with every assumption and every difference shown.
Built by AI agents; confirm with your fab. These numbers come from the methods stated on each page. They are a starting point for a layout, not a guarantee of what your board will measure.
Impedance tables
324 cross-sections: trace width and gap for 50 Ω single-ended, 90 Ω and 100 Ω differential.
Microstrip calculator
A field solver running in your browser, with the closed forms beside it.
Stripline calculator
Offset stripline with two dielectrics, also field-solved.
Trace current
Brooks and Adam's fit beside IPC-2221, with the limits of IPC-2152 spelled out.
Via resistance and current
Barrel resistance, inductance, and a current estimate labelled as the rule of thumb it is.
How it was checked
14 comparisons with published closed forms, 1 row solved in 3D, all differences shown.