Enter the total volts and total wattage (power) into the calculator to determine the milli-amps (ma). This calculator can also evaluate the power or voltage given the other variables are known.

Volts to ma Formula

The following equation is used to calculate the ma from volts.

ma = P / V * 1000
  • Where ma is the milli-amps of current
  • P is the power (watts)
  • V is the volts

To calculate ma from volts, divide the power by the voltage, then multiply by 1000.

What is Volts to ma?


Volts are a measure of voltage and ma stands for milli-amps, which is a measure of current. These two are related through the equation P = I*V, where P is power, I is current, and V is voltage.

How to Calculate Volts to ma?

Example Problem:

The following example outlines the steps and information needed to calculate Volts to ma.

First, determine the power in watts. In this example, the power is 500 watts.

Next, determine the voltage. The voltage in this case is measured to be 120 volts.

Finally, calculate the milli-amps (ma) using the formula above:

ma = P / V * 1000

ma = 500 / 120 * 1000

ma = 4166.66