Voltage to Amperes Calculator
Calculate the Current (Amperes) flowing through a circuit given the Voltage (Volts) and Resistance (Ohms).
Ohm's Law Calculator
Electrical Current
Ohm's Law: Converting Voltage to Amperes
Ohm's Law states that the current flowing through a conductor between two points is directly proportional to the voltage across the two points. To convert Voltage into Amperes, you must know the resistance (Ohms) present in the circuit.
The Ohm's Law Formula
To find the current (I), divide the voltage (V) by the resistance (R).
- Formula:
Amperes = Volts / Ohms - Example: A standard 12V automotive battery connected across a 3 Ohm circuit will push exactly 4 Amperes of current.
Frequently Asked Questions
What is electrical resistance (Ohms)?
Resistance is a measure of the opposition to current flow in an electrical circuit. Everything in a circuit, including the copper wires themselves, possesses some level of resistance. It acts as friction against the voltage "pressure."
Can I convert Voltage to Amps without knowing Ohms?
No, unless you know the Power (Watts) instead. Mathematical conversions for electricity require two known variables to solve for a third unknown. The formula using Power is Amps = Watts / Volts.