Volts to Amps Electrical Conversion Calculator

Convert volts to amps by entering the voltage and the electrical power in watts, or the resistance of the circuit.

Convert Volts and Watts to Amps

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Convert Volts and Ohms to Amps

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Results:

  Amps
  Milliamps


Convert amps to volts

How to Convert Volts to Amps

Voltage is the potential difference in an electrical circuit, measured in volts. It might be easier to think of it as the amount of force or pressure pushing electrons through a conductor. To convert volts to amps, a measure of current, it’s possible to use a formula defined by Watt’s Law.

Watt’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:
Current(A) = Power(W) ÷ Voltage(V)

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


amps = watts ÷ volts
amps = 100 W ÷ 120 V
amps = .83 A

Convert Volts to Amps using Resistance

Ohm’s Law provides an alternate formula to find volts if amps and the electrical resistance is known. To calculate amps, divide the voltage by the resistance in ohms.

Current(A) = Voltage(V) ÷ Resistance(Ω)

For example, let’s find the current of a 12 volt circuit with 10 ohms of resistance.


amps = volts ÷ ohms
amps = 12 V ÷ 10 Ω
amps = 1.2 A

Equivalent Volts and Amps Measurements

Equivalent volts and amps for various power ratings
Voltage Current Power
5 Volts 1 Amps 5 Watts
5 Volts 2 Amps 10 Watts
5 Volts 3 Amps 15 Watts
5 Volts 4 Amps 20 Watts
5 Volts 5 Amps 25 Watts
5 Volts 6 Amps 30 Watts
5 Volts 7 Amps 35 Watts
5 Volts 8 Amps 40 Watts
5 Volts 9 Amps 45 Watts
5 Volts 10 Amps 50 Watts
5 Volts 11 Amps 55 Watts
5 Volts 12 Amps 60 Watts
5 Volts 13 Amps 65 Watts
5 Volts 14 Amps 70 Watts
5 Volts 15 Amps 75 Watts
5 Volts 16 Amps 80 Watts
5 Volts 17 Amps 85 Watts
5 Volts 18 Amps 90 Watts
5 Volts 19 Amps 95 Watts
5 Volts 20 Amps 100 Watts
12 Volts 0.4167 Amps 5 Watts
12 Volts 0.8333 Amps 10 Watts
12 Volts 1.25 Amps 15 Watts
12 Volts 1.667 Amps 20 Watts
12 Volts 2.083 Amps 25 Watts
12 Volts 2.5 Amps 30 Watts
12 Volts 2.917 Amps 35 Watts
12 Volts 3.333 Amps 40 Watts
12 Volts 3.75 Amps 45 Watts
12 Volts 4.167 Amps 50 Watts
12 Volts 4.583 Amps 55 Watts
12 Volts 5 Amps 60 Watts
12 Volts 5.417 Amps 65 Watts
12 Volts 5.833 Amps 70 Watts
12 Volts 6.25 Amps 75 Watts
12 Volts 6.667 Amps 80 Watts
12 Volts 7.083 Amps 85 Watts
12 Volts 7.5 Amps 90 Watts
12 Volts 7.917 Amps 95 Watts
12 Volts 8.333 Amps 100 Watts
24 Volts 0.2083 Amps 5 Watts
24 Volts 0.4167 Amps 10 Watts
24 Volts 0.625 Amps 15 Watts
24 Volts 0.8333 Amps 20 Watts
24 Volts 1.042 Amps 25 Watts
24 Volts 1.25 Amps 30 Watts
24 Volts 1.458 Amps 35 Watts
24 Volts 1.667 Amps 40 Watts
24 Volts 1.875 Amps 45 Watts
24 Volts 2.083 Amps 50 Watts
24 Volts 2.292 Amps 55 Watts
24 Volts 2.5 Amps 60 Watts
24 Volts 2.708 Amps 65 Watts
24 Volts 2.917 Amps 70 Watts
24 Volts 3.125 Amps 75 Watts
24 Volts 3.333 Amps 80 Watts
24 Volts 3.542 Amps 85 Watts
24 Volts 3.75 Amps 90 Watts
24 Volts 3.958 Amps 95 Watts
24 Volts 4.167 Amps 100 Watts
120 Volts 0.0417 Amps 5 Watts
120 Volts 0.0833 Amps 10 Watts
120 Volts 0.125 Amps 15 Watts
120 Volts 0.1667 Amps 20 Watts
120 Volts 0.2083 Amps 25 Watts
120 Volts 0.25 Amps 30 Watts
120 Volts 0.2917 Amps 35 Watts
120 Volts 0.3333 Amps 40 Watts
120 Volts 0.375 Amps 45 Watts
120 Volts 0.4167 Amps 50 Watts
120 Volts 0.4583 Amps 55 Watts
120 Volts 0.5 Amps 60 Watts
120 Volts 0.5417 Amps 65 Watts
120 Volts 0.5833 Amps 70 Watts
120 Volts 0.625 Amps 75 Watts
120 Volts 0.6667 Amps 80 Watts
120 Volts 0.7083 Amps 85 Watts
120 Volts 0.75 Amps 90 Watts
120 Volts 0.7917 Amps 95 Watts
120 Volts 0.8333 Amps 100 Watts