Ohm's Law Solver
Given any two of voltage (V), current (A), and resistance (Ω), solve for the third. Also returns power (P = V × I).
Limitations: DC / purely resistive loads. For AC circuits, impedance + phase angle matter — this tool does not account for reactance.
What to do next: For AC circuits with capacitance or inductance, use an impedance calculator (future work). For wire sizing and voltage drop over distance, see the Voltage Drop Calculator.