Current (Amps) Calculator

Calculate electrical current using voltage, power, or resistance

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How to Calculate Electric Current

Using Ohm's Law

The basic formula for calculating current (I) is:

I = V / R where:
I = Current in Amperes (A)
V = Voltage in Volts (V)
R = Resistance in Ohms (Ω)

Using Power

You can also calculate current using power and voltage:

I = P / V where:
I = Current in Amperes (A)
P = Power in Watts (W)
V = Voltage in Volts (V)