Ohms Law Resistance Calculator (R = V / I)

Find resistance from voltage and current using Ohms law R = V / I. It also computes power and conductance, with a simple circuit diagram.

Input

Enter the voltage and current to compute resistance with Ohms law R = V / I.

Voltage V

Voltage across the circuit in volts

Current I

Current flowing through the circuit in amperes

Resistance R

24Ω

About 0.024 kΩ

Power P = V times I

6 W

Power

6,000 mW

Conductance G

0.041667 S

Resistance R = V / I and power P = V times I. The resistance is undefined when the current I is 0.

Resistance is found with R = V / I, where V is voltage in volts, I is current in amperes, and R is resistance in ohms.
Power is computed as P = V times I, measured in watts.
When the current is 0 the resistance is undefined, so enter a current greater than 0.
Conductance is the reciprocal of resistance, G = I / V, measured in siemens.
With accurate voltage and current values you can estimate the resistance of a DC circuit directly.

Tell us what you think of this calculator.