Electrical / 08
Ohm’s Law Calculator
Enter any pair of voltage, current, and resistance to calculate the remaining quantity and electrical power.
How it works
V = IR; I = V/R; R = V/I; P = VI
For 12 V across 6 Ω, current is 2 A and power is 24 W.
FAQ
Can I use this for AC circuits?
It applies directly to DC resistive circuits. AC impedance and phase shift require additional treatment.
Which inputs do I need?
Use the panel matching your two known quantities: V and R, V and I, or I and R.
Why require positive values?
These panels use positive magnitudes and finite resistance. Zero-input cases can be indeterminate and are not modeled here.