CalcOhm's Law Calculator
Last updated: 2026-08-24
Ohm's Law Calculator — Calculate voltage, current or resistance.
Inputs
Result
Enter values and press Calculate
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How to use it
- Identify dos of the tr is variables
- Despejar the variable desconocida
- Apply V=I×R, I=V/R, or R=V/I
- Verify units
Common mistakes
- ⚠️ Not entering to the less dos values
- ⚠️ División per cero
- ⚠️ Confusing current with voltaje
Worked example
Calculate current: 12V across 4 ohm resistor.
The Ley of Ohm relaciona voltaje, current and resistance in a circuito.
Input guide
| Field | Typical range |
|---|---|
| resistencia | 0-1,000,000,000,000 Ω |
| corriente | 0-1,000,000,000,000 A |
| voltaje | 0-1,000,000,000,000 V |