Ohm's Law Calculator with Unit Conversion
Results will appear here
Ohm's Law Formulas
V = I × R
I = V / R
R = V / I
P = V × I
Where:
- V is voltage in volts (V)
- I is current in amps (A)
- R is resistance in ohms (Ω)
- P is power in watts (W)
How to Use the Calculator
- Enter any two known values with their units
- Click "Calculate" to find the missing values
- Results will be displayed in the selected units
Unit Conversion Reference
| Parameter | Units | Conversion |
|---|---|---|
| Voltage | 1 kV = 1000 V 1 V = 1000 mV |
Multiply by 1000 to convert to next smaller unit |
| Current | 1 kA = 1000 A 1 A = 1000 mA |
Multiply by 1000 to convert to next smaller unit |
| Resistance | 1 MΩ = 1000 kΩ 1 kΩ = 1000 Ω 1 Ω = 1000 mΩ |
Multiply by 1000 to convert to next smaller unit |
| Power | 1 MW = 1000 kW 1 kW = 1000 W 1 W = 1000 mW |
Multiply by 1000 to convert to next smaller unit |