You can't convert volts to amps since volt and amp units represent different quantities (like converting gallons to miles).

However, if you have at least least two of the following three: amps, volts or watts then the missing one can be calculated. Since watts are amps multiplied by volts, there is a simple relationship between them.

Use this handy Volts / Watts / Amps Converter to calculate volts, watts, or amps.

The following equations can be used to convert between amps, volts, and watts:

**Converting Watts to Amps**

## The conversion of Watts to Amps at fixed voltage is governed by the equation Amps = Watts/Volts

## For example 12 watts/12 volts = 1 amp

**Converting Amps to Watts**

## The conversion of Amps to Watts at fixed voltage is governed by the equation Watts = Amps x Volts

## For example 1 amp * 110 volts = 110 watts

**Converting Watts to Volts**

## The conversion of Watts to Volts at fixed amperage is governed by the equation Volts = Watts/Amps

## For example 100 watts/10 amps = 10 volts

**Converting Volts to Watts**

## The conversion of Volts to Watts at fixed amperage is governed by the equation Watts = Amps x Volts

## For example 1.5 amps * 12 volts = 18 watts

**Converting Volts to Amps at fixed wattage**

## The conversion of Volts to Amps if the wattage is known is governed by the equations Amps = Watts/Volts

## For example 120 watts/110 volts = 1.09 amps

**Converting Amps to Volts at fixed wattage**

## The conversion of Amps to Volts if the wattage is know is governed by the equation Volts = Watts/Amps

## For Example, 48 watts / 12 Amps = 4 Volts

**Converting Volts to Amps at a fixed resistance**

## If you know the volts and the load of the resistance the amps are found by Ohm's law: Amps = Volts / Resistance

**Converting Amps to Volts at fixed resistance**

## If you know the amps and the resistance Ohm's law becomes Volts = Amps * Resistance