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Ohm's Law Calculator
Enter any two of voltage, current, resistance, and power — get the other two, with a live circuit diagram.
Pick the two values you know, then type them in.
Values
5 V · known
22.7 mA · computed
220 Ω · known
114 mW · computed
- Voltage
- 5 V
- Current
- 22.7 mA
- Resistance
- 220 Ω
- nearest E24 220 Ω
- Power
- 114 mW
- Formula
- I = V ÷ R · P = V² ÷ R