Volts to Amps Electrical Conversion Calculator

Convert Volts and Watts to Amps

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Convert Amps and Watts to Volts

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How to Convert Volts to Amps

Amperage is a measure of current, which can be found from volts and watts using Ohm’s Law. Ohm’s Law states that current = power ÷ voltage. Power is measured in watts and voltage is measured in volts.

Thus, to find amps substitute the volts and watts in the formula:

amps = watts ÷ volts

For example, find the amperage of a 100 watt light bulb at 120 volts.

current = watts ÷ volts
current = 100 ÷ 120
current = .83A

How to Convert Amps to Volts

Using algebra it is possible to use the Ohm’s Law formula above to solve for volts:

volts = watts ÷ amps

For example, find the voltage of a device that uses 120 watts of power with a current of 10 amps.

voltage = watts ÷ amps
voltage = 120 ÷ 10
voltage = 12V