How to convert amps to volts

How to convert electric current in amps (A) to voltage in volts (V).

You can calculate volts from amps and watts or ohms, but you can't convert amps to volts since volt and amp units represent different quantities.

Amps to volts calculation with watts

The voltage V in volts (V) is equal to the power P in watts (W), divided by the current I in amps (A):

V_(V) = P_(W) / I_(A)

So

volt = watt / amp

or

V = W/A

Example

What is the voltage supply of an electrical circuit that has power consumption of 45 watts and current flow of 3 amps?

V = 45W / 3A = 15V

Amps to volts calculation with ohms

The voltage V in volts (V) is equal to the power P in watts (W), divided by the current I in amps (A):

V_(V) = I_(A) × R_(Ω)

So

volt = amp × ohm

or

V = A × Ω

Example

What is the voltage supply of an electrical circuit that has current flow of 3 amps and resistance of 10 ohms?

Solution:

V = 3A × 10Ω = 30V

 

How to convert volts to amps ►

 

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See also

• Amps to volts calculator
• How to convert volts to amps
• Amp
• Volt
• Watt
• Electrical calculation
• Power conversion