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?
The voltage V is equal to 45 watts divided by 3 amps:
V = 45W / 3A = 15V
Amps to volts calculation with ohms
The voltage V in volts (V) is equal to the current I in amps (A), times the resistance R in ohms (Ω):
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?
According to ohm's law the voltage V is equal to 3 amps times 10 ohms:
V = 3A × 10Ω = 30V