Fuss-Free Browser Apps

Provide any two of Voltage (V), Current (I), Resistance (R), or Power (P). The calculator solves the remaining two using Ohm’s Law and power equations.

Yes. Use the unit dropdown next to each field (V/mV/kV, A/mA, Ω/kΩ/MΩ, W/mW/kW). Values are converted internally so mixed units are fine.

Ohm’s Law and power relations: V = I×R, P = V×I, P = I²R, P = V²/R. The app chooses the simplest valid pair based on your inputs.

You likely entered fewer than two values or a conflicting set (e.g., values that don’t satisfy the equations). Check zeros/negatives and try again.

This simple calculator assumes DC (or AC at a single moment using RMS values). For reactive components (L/C), impedance is frequency-dependent and not covered here.

Results are rounded to a sensible precision for readability. If you need more precision, you can change the unit (e.g., Ω → kΩ) or copy the result and compute further.

No. It runs fully in your browser with no tracking and works offline once cached.