Ohm's Law Calculator (Residential)
V = IR. Pick which to solve for. Residential circuit framing.
Result
Voltage
48.000 V
V = 12 A × 4 Ω = 48.000
- FormulaV = 12 A × 4 Ω
- Result48.0000 V
Step-by-step
- V = 12 A × 4 Ω = 48.000 V.
How to use this calculator
- Pick which value to solve for.
- Enter the two known values.
About this calculator
Ohm's law for residential / electrical-installation context. For a richer version with power formulas (P = IV = I²R = V²/R), see /calc/science/ohms-law-extended.
Frequently asked
120 V (most outlets/circuits). 240 V (large appliances: dryers, ranges, ACs).
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