Free Online Engineering Calculators

New online tools accurately compute conductor resistance, inductance and capacitance for engineers, scientists and students. Engineering calculators are now online at

Engineering calculators are now online at Conductor electrical properties are instantly and accurately computed, providing resistance, inductance, and capacitance values for numerous conductor configurations. No signup or login required.


Navigate to or click the Toolbox menu at

EMI Software LLC created these new online calculators because existing websites use overly simplified models and equations that don’t accurately account for skin effect and proximity effect, characteristics that are important at high frequencies and for closely spaced conductors.

“There are similar calculators online, but none with the accuracy of these new modeling tools.” remarked Steve Newson, CTO of EMI Software.

Equations used are a simplified subset from proprietary models in EMI Analyst™, the company’s flagship electromagnetic interference analysis software program.

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