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`V = I * R`

Enter a value for all fields

The **Voltage** calculator computes the Voltage (V) based on Ohm's Law using the Current (I) and the Resistance (R).

**INSTRUCTIONS:** Choose units and enter the following:

- (
**I**) Current. - (
**R**) Resistance

**Voltage (V):** The calculator returns the potential in volts. However, this can be automatically converted to other electric potential units via the pull-down menu.

The Ohms Law formula for voltage (potential) based on current and resistance is:

V = I • R

where:

- V = voltage
- I = current
- R = resistance

**Power:**(watts, milliwatts, kilowatts, horsepower)**Potential:**(volts, millivolts)**V = I • R**: This computes the potential (volts) as a function of current (amps) and resistance (ohms).**V = P / I**: This computes the potential (volts) as a function of power (watts) and current (amps).**V = √(P • R)**: This computes the potential (volts) as a function of power (watts) and resistance (ohms).

**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).