Electrical Relationships Calculator

Enter one supported positive pair to solve Ohm’s law and electrical power relationships. This informational calculator does not provide wire, breaker, voltage-drop, ampacity, or electrical-code recommendations. Calculate it clearly with Figur.

How the electrical relationships calculator works

Enter one supported positive pair to solve Ohm’s law and electrical power relationships. This informational calculator does not provide wire, breaker, voltage-drop, ampacity, or electrical-code recommendations.

Method and assumptions

Figur applies V = I × R and P = V × I to one of six supported positive input pairs to derive voltage, current, resistance, and power.

  • Values describe an ideal direct-current relationship or equivalent resistive load.
  • Both known values are positive, finite, and expressed in V, A, Ω, or W as identified by the selected pair.
  • The tool evaluates mathematical relationships and does not assess conductors, protection, voltage drop, ampacity, or code.

Mathematical reference only; not electrical design, installation, or safety advice.

Sources and references

Worked example

120 volts and 10 amps.

The relationship gives 12 ohms and 1,200 watts.

Frequently asked questions

Which pairs can I enter?

Use V+I, V+R, I+R, P+V, P+I, or P+R; the calculator derives all four values.

Is this electrical design advice?

No. It only evaluates ideal mathematical relationships and never sizes conductors, breakers, or installations.

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