Current Calculator (Ohm's Law)
Calculate current from voltage and resistance.
V
Ω
Result
0,12 A
Current: 0.12 A
Result in all units
Step-by-step solution
I = V / R
What Is Current (Ohm's Law)?
Electric current is the amount of charge passing through a conductor per unit of time. According to Ohm's law, it is found from the relationship between voltage and resistance.
How is it calculated?
How Is Current Calculated?
I = V ÷ R
- Enter the voltage (volts) and the resistance (ohms).
- Divide the voltage by the resistance.
For example, 12 V and 4 Ω: 12 ÷ 4 = 3 A.
Frequently Asked Questions
What is the unit of current?
Current is measured in amperes (A); 1 ampere is a flow of 1 coulomb of charge per second.