PCB线宽计算器
Use IPC-2221 based estimation to size copper trace width and review the electrical impact on resistance, voltage drop, and power loss.
符合IPC-2221标准
When to use this calculator
Use it during routing to estimate whether your copper width is in the right range before stackup and DFM review.
Review resistance, voltage drop, and power loss when you need to understand electrical impact beyond width only.
Use the result as a conversation starter with fabrication or assembly engineers when planning copper weight and routing strategy.
主要功能
符合IPC-2221标准
基于行业标准IPC-2221公式进行计算，确保可靠性。
内层与外层
支持具有不同热特性的内层和外层计算。
全面结果
一次计算即可获得线宽、电阻、电压降和功率损耗。
Related resources & next steps
Check how much current a given trace can safely carry after you estimate width.
Review controlled impedance requirements when routing high-speed or RF traces.
Move from rough estimation to manufacturable copper, stackup, and tolerance planning.
Send your files to discuss DFM, copper weight, trace width, and fabrication constraints with engineering.
常见问题
什么是IPC-2221标准？
IPC-2221是印刷板设计的通用标准。它提供了用于计算铜线电流承载能力、温升和线路几何形状之间关系的公式。
为什么线宽很重要？
适当的线宽可确保PCB能够承受所需的电流而不会过热，从而避免导致电路板故障或损坏。
Can I use this calculator as the final manufacturing value?
Use it as an engineering estimate, not a final fabrication rule. Finished copper thickness, etching tolerance, stackup details, and thermal environment can change the real requirement, so final values should be reviewed with your PCB manufacturer.