Construction
Ohms Law Calculator
The most fundamental electrical relationship. Enter any two values; the calculator finds the others.
Watts (W)
—
- Ohms (Ω)
- —
- kW
- —
- kWh per day (24h)
- —
FAQ
V = IR really cover everything? +
Plus P=VI, yes. Together they handle 95% of practical residential electrical math.
What about AC vs DC? +
For DC and resistive AC loads (heaters, incandescent), these formulas are exact. Motors and reactive loads need power factor.