Technology & Computing
PCB Stripline Trace Impedance Calculator
Estimate the characteristic impedance of a symmetric stripline trace embedded between two reference planes.
Your inputs
Change any value to update the result instantly.
Stripline characteristic impedance
41.6762 Ω
Trace width
5 mil
Plane spacing
12 mil
Dielectric constant
4.3
Stripline is fully shielded between planes, giving more predictable impedance than microstrip but requiring more board layers.
Formula and working
Z0 (Ω, IPC-2141 approx) = (60/√εr) × ln(1.9b / (0.8w+t)), b = distance between planes
- 1
Collect the inputs
Trace width (mil) = 5; Trace thickness (mil) = 1.4; Distance between reference planes (mil) = 12; Dielectric constant (εr) = 4.3
- 2
Apply the formula
Z0 (Ω, IPC-2141 approx) = (60/√εr) × ln(1.9b / (0.8w+t)), b = distance between planes
- 3
Result
Stripline characteristic impedance = 41.6762 Ω
Frequently asked questions
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
Report a mistake or request an improvement
Tell us if a formula, unit, explanation, or result needs attention. Your message will include this calculator’s name and page.
Related calculators
PCB Microstrip Differential Impedance Calculator
Estimate the differential impedance of a microstrip trace pair on a PCB from geometry and dielectric constant.
Antenna Gain to EIRP Calculator
Calculate effective isotropic radiated power (EIRP) from transmitter power, cable loss, and antenna gain.
Fresnel Zone Clearance Radius Calculator (60% Rule)
Calculate the first Fresnel zone radius at midpoint and the recommended 60% clearance for a wireless link.
RF Free Space Path Loss (FSPL) Calculator
Calculate the free space path loss of an RF signal given frequency and distance.
VSWR to Return Loss & Reflection Coefficient Calculator
Convert VSWR to return loss (dB) and the magnitude of the reflection coefficient for an RF impedance match.
Gaming Mouse eDPI & 360° Turn Distance Calculator
Calculate effective DPI (eDPI) from mouse DPI and in-game sensitivity, and the physical mouse distance for a 360° turn.