This PCB via current calculator is based on the published formulas and experimental data from IPC-2221 and IPC-2152. It is intended for quick, early-stage estimation of a via’s current-carrying capacity based on its diameter and allowed temperature rise.

The actual ampacity of a PCB via can be affected by material batch variations, copper roughness, stack-up, pad heat sinking, airflow (forced or natural), adjacent heat sources, manufacturing tolerances, and other factors.

The tool does not account for every variable; calculated values may differ significantly from measured results. Always verify compliance with your product’s safety standards and industry norms before finalizing the design.