Resistance Calculator
Calculate resistance from voltage and current using Ohm's Law (R = V ÷ I).
Formula
R = V ÷ I
- R
- Resistance, in ohms
- V
- Voltage, in volts
- I
- Current, in amps
What this calculator does
Solves for resistance given voltage and current, using Ohm's Law.
Use cases
- Find the resistance of a load from a voltage and current reading
- Troubleshoot a circuit by comparing measured vs. expected resistance
- Verify a component's resistance against its rated value