Z = R + j(XL − XC)Series RLC circuit analyzer
Explore how resistance, inductance, and capacitance shape impedance, phase, current, and AC power.
Electrical Theory Calculators
Choose one electrical theory calculator and work with it in a focused space. Every tool keeps its formulas, assumptions, units, and calculated values together so you can test a prediction instead of treating the result as a black box.
3 theory instrumentsCalculates in your browserFormulas stay visible
|S| = √3 VLL ILBalanced three-phase power
Connect line-to-line voltage, line current, and power factor to apparent, real, and reactive power.
R = (Vs − n·Vf) / ILED resistor calculator
Start from a supply and an LED datasheet: standard resistor, real current and wattage, then DC wire-run drop and battery sag.
A useful way to work with a calculator
Section titled “A useful way to work with a calculator”- Predict whether the result should be larger, smaller, leading, or lagging.
- Change one input and explain the new result in words.
- Sketch the related circuit, impedance triangle, or power triangle.
- Check the units and test a limiting case.
- Record any mismatch between your prediction and the model.
Discuss this page
Ask a question or add a source. Comments are community contributions, not reviewed material or professional advice.
Comments are hosted on GitHub Discussions through giscus and load only when you choose to show them.
Loading discussion…