PCB trace impedance
Approximate single-ended microstrip or symmetrical stripline impedance.
Inputs
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Results
- Approximate impedance
- 53.9939822 Ω
This IPC-2141 approximation is for a single-ended trace, not a differential pair. For stripline, h is the total separation between ground planes. Final fabrication requires a field solver and the manufacturer's stackup; solder mask is not included.
Formula & guidance
microstrip: Z=87/√(εr+1.41) ln[5.98h/(0.8w+t)]
This IPC-2141 approximation is for a single-ended trace, not a differential pair. For stripline, h is the total separation between ground planes. Final fabrication requires a field solver and the manufacturer's stackup; solder mask is not included.
Change the example inputs and check each field’s units. Use equipment datasheets and applicable project standards for final decisions. Results do not establish Canadian electrical-code compliance or certify a design.