Ohm’s Law Calculator

Engineer-ready Ohm’s Law tool with smart input checks. Supports mixed units, power, and energy timing. Compare scenarios, view steps, and download clean outputs instantly.

Calculator
Enter any two values to solve the rest. Mixed units are supported.
Tip: Use “Auto-detect” for quick solving.
V, mV, kV supported.
A, mA supported.
Ω, kΩ, MΩ supported.
W, mW, kW supported.
Used for energy: E = P·t.
J, kJ, Wh, kWh supported.
Helps when more than two values are entered.