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.
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.
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
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.