オンラインインピーダンス計算機
Estimate single-ended trace impedance for microstrip and stripline routing, then use the result as an early design and manufacturing review reference.
FR4では通常4.2-4.6
1oz 銅箔 ≈ 0.035mm
マイクロストリップ モデル
When to use this calculator
Use it during stackup and routing decisions when you need a fast estimate of single-ended impedance for outer or inner layer traces.
Check whether your chosen dielectric thickness and trace width are directionally close to a target impedance before final fabrication review.
Use it as a starting point when discussing stackup, material, and impedance control capability with your PCB manufacturer.
主な機能
複数モデル対応
マイクロストリップとストリップラインに対応。
即時計算
パラメータ変更でリアルタイムに結果表示。
IPC規格
IPC-2221式に基づく計算。
Related resources & next steps
Review dielectric constant assumptions when material selection has a strong effect on impedance targets.
Check trace width from a current-carrying perspective after reviewing impedance targets.
Move from approximate impedance math to a production-ready stackup and controlled impedance review.
Send your target impedance, stackup assumptions, and fabrication goals to our engineering team.
よくある質問
特性インピーダンスとは？
電圧と電流の比率。整合で反射を最小化。
FR4のErは？
通常4.2-4.6。
正確ですか？
IPC-2221近似式です。製造前にメーカーと確認を。