# Amps to Volts Conversion Calculator

Convert amps to volts to find the voltage across the terminals of an electrical device in volts. Enter the current in amps and the power in watts or the amps and the resistance in ohms below to calculate the voltage.

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## How to Convert Amps to Volts

*Amps*, short for *amperes*, are a standard unit to measure the electrical current flowing in an electrical circuit. A current of 1 A is equivalent to a rate of flow of charge of 1 Coulomb in 1 second.

Voltage is the measure of the electric potential in an electric circuit to move an electric charge. It is measured in Volts; 1 Volt equals the potential needed to move 1 A of current against a 1 ohm of resistance.

Two methods are generally used to convert Amps to Volts, the Watt’s Law power formula and the Ohm’s Law formula.

### Conversion Using the Power Formula

To convert amps to volts, we can use the power formula that allows us to derive the equation for calculating the voltage. Per the power formula, voltage is equal to the power delivered to a device divided by the current that flows through it:

V_{(V)} = P_{(W)} ÷ I_{(A)}

The voltage *V* is equal to the power *P* in watts divided by the current *I* in amps.

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

V_{(V)} = 120 W ÷ 10 A

V_{(V)} = 12 V

### Conversion Using Ohm’s Law

It is also possible to convert amps to volts if the resistance is known, thanks to the Ohm’s Law formula. Using Ohm’s Law, we can state that voltage is equal to electrical current times the resistance.

V_{(V)} = I_{(A)} × R_{(Ω)}

The voltage *V* is equal to the current *I* in amps times the resistance *R* in ohms.

**For example,**let’s find the voltage of a circuit with 1.2 amps of current and 20 ohms of resistance.

V_{(V)} = 1.2 A ÷ 20 Ω

V_{(V)} = 24 V

## Amps to Volts Conversion Table

Amperes to voltage conversions based on the power formula.

Current (A) | Voltage (V) | Power (W) |
---|---|---|

1 amp | 5 volts | 5 watts |

1 amp | 10 volts | 10 watts |

1 amp | 15 volts | 15 watts |

1 amp | 20 volts | 20 watts |

1 amp | 25 volts | 25 watts |

1 amp | 30 volts | 30 watts |

1 amp | 35 volts | 35 watts |

1 amp | 40 volts | 40 watts |

1 amp | 45 volts | 45 watts |

1 amp | 50 volts | 50 watts |

1 amp | 55 volts | 55 watts |

1 amp | 60 volts | 60 watts |

1 amp | 65 volts | 65 watts |

1 amp | 70 volts | 70 watts |

1 amp | 75 volts | 75 watts |

1 amp | 80 volts | 80 watts |

1 amp | 85 volts | 85 watts |

1 amp | 90 volts | 90 watts |

1 amp | 95 volts | 95 watts |

1 amp | 100 volts | 100 watts |

2 amps | 2.5 volts | 5 watts |

2 amps | 5 volts | 10 watts |

2 amps | 7.5 volts | 15 watts |

2 amps | 10 volts | 20 watts |

2 amps | 12.5 volts | 25 watts |

2 amps | 15 volts | 30 watts |

2 amps | 17.5 volts | 35 watts |

2 amps | 20 volts | 40 watts |

2 amps | 22.5 volts | 45 watts |

2 amps | 25 volts | 50 watts |

2 amps | 27.5 volts | 55 watts |

2 amps | 30 volts | 60 watts |

2 amps | 32.5 volts | 65 watts |

2 amps | 35 volts | 70 watts |

2 amps | 37.5 volts | 75 watts |

2 amps | 40 volts | 80 watts |

2 amps | 42.5 volts | 85 watts |

2 amps | 45 volts | 90 watts |

2 amps | 47.5 volts | 95 watts |

2 amps | 50 volts | 100 watts |

3 amps | 1.667 volts | 5 watts |

3 amps | 3.333 volts | 10 watts |

3 amps | 5 volts | 15 watts |

3 amps | 6.667 volts | 20 watts |

3 amps | 8.333 volts | 25 watts |

3 amps | 10 volts | 30 watts |

3 amps | 11.667 volts | 35 watts |

3 amps | 13.333 volts | 40 watts |

3 amps | 15 volts | 45 watts |

3 amps | 16.667 volts | 50 watts |

3 amps | 18.333 volts | 55 watts |

3 amps | 20 volts | 60 watts |

3 amps | 21.667 volts | 65 watts |

3 amps | 23.333 volts | 70 watts |

3 amps | 25 volts | 75 watts |

3 amps | 26.667 volts | 80 watts |

3 amps | 28.333 volts | 85 watts |

3 amps | 30 volts | 90 watts |

3 amps | 31.667 volts | 95 watts |

3 amps | 33.333 volts | 100 watts |

4 amps | 1.25 volts | 5 watts |

4 amps | 2.5 volts | 10 watts |

4 amps | 3.75 volts | 15 watts |

4 amps | 5 volts | 20 watts |

4 amps | 6.25 volts | 25 watts |

4 amps | 7.5 volts | 30 watts |

4 amps | 8.75 volts | 35 watts |

4 amps | 10 volts | 40 watts |

4 amps | 11.25 volts | 45 watts |

4 amps | 12.5 volts | 50 watts |

4 amps | 13.75 volts | 55 watts |

4 amps | 15 volts | 60 watts |

4 amps | 16.25 volts | 65 watts |

4 amps | 17.5 volts | 70 watts |

4 amps | 18.75 volts | 75 watts |

4 amps | 20 volts | 80 watts |

4 amps | 21.25 volts | 85 watts |

4 amps | 22.5 volts | 90 watts |

4 amps | 23.75 volts | 95 watts |

4 amps | 25 volts | 100 watts |