Current from Potential and Resistance

`I = (DeltaV) / R`

Enter a value for all fields

The Electrical Current calculator computes the current based on Ohm's Law using electrical Resistance (R) and Potential (V).

INSTRUCTIONS: Choose units and enter the following:

(V) Potential (voltage).
(R) Resistance.

Electrical Current: The calculator returns the electrical current in amperes (amps). However, this can be automatically converted to other electric current units via the pull-down menu.

General Information

For more information on the relationship between electrical power, current, resistance and potential, see the Ohm's Law Calculator.

Ohm's Law Calculator

Power: (watts, milliwatts, kilowatts, horsepower)
- P = I • V: This computes the power (watts) as a function of current (amps) and potential (volts).
- P = R • I²: This computes the power (watts) as a function of current (amps) and resistance (ohms).
- P = V² / R: This computes the power (watts) as a function of potential (volts) and resistance (ohms).
Potential: (volts, millivolts)
Resistance: (ohms, milliohms, kiloohms)
- R = V²/P: This computes the resistance (ohms) as a function of potential (volts) and power (watts).
- R = P / I² : This computes the resistance (ohms) as a function of power (watts) and current (amps).
- R = V / I : This computes the resistance (ohms) as a function of potential (volts) and current (amps).
Current: (amps, milliamps, microamps, gilberts)
- I = V / R: This computes the current (amps) as a function of potential (volts) and resistance (ohms).
- I = P / V : This computes the current (amps) as a function of the power (watts) and the potential (volts).
- I = √(P/R): This computes the current (amps) as a function of the power (watts) and the resistance (ohms).