# Via Inductance

- $L$
- Inductance of the via [nH]
- $H$
- Length of via [cm]
- $d$
- Diameter of via [cm]

Consider a power supply pin of a component that goes through a via to the power plane of a 0.157 cm thickness board, the diameter of the via is 0.041 cm:

L = 2(0.157){ln(4(0.157)/0.041)+1} = 1.2nH