⚡ PCB Impedance Calculator

Outer Layer Microstrip with Solder Mask – Reference: Polar Si9000

📐 Outer Layer Stackup Parameters
FR4 4.2 RO4003C 3.8 RO4350B 3.5
4 5 6 8
0.5 oz (0.68 mil) 1 oz (1.37 mil) 1.5 oz (2.06 mil) 2 oz (2.74 mil) 3 oz (4.11 mil)
4 8 10
📩 Need Inner Layer Impedance Calculation?
We offer free simulation for stripline, asymmetric, and differential inner layer structures using professional field solvers (comparable to Polar Si9000).
Please send your stackup requirements to: sales@pcbsky.com and we'll respond promptly.
💡 Outer layer results use Wheeler/Hammerstad formulas with solder mask correction. Accuracy is typically within ±5% of Polar Si9000 for common geometries.