Use this browser-based tool for an initial engineering estimate. Inputs remain in this page and are not sent to a server.
Method and units
This approximate uncoated microstrip equation is Z₀ = 87/√(εr + 1.41) × ln[5.98h/(0.8w + t)], with w, h and t in the same units.
Model limits
Limited to a simple uncoated microstrip over a continuous plane. It omits solder mask, roughness, frequency dependence, coplanar conductors and differential coupling. Confirm the production geometry with a field solver and fabricator.
Use the result in your project
Record the assumptions with the result. Check actual material and component data, evaluate tolerances and confirm the proposed construction before releasing manufacturing files.