Current Through Resistor Calculator

This tool calculates the current (I) in Amperes. Enter the values of

  • Resistance in Ohm
  • Voltage in Volt


I = V/R

This is also known as Ohm’s law which states that the current through a conductor (I) with a constant resistance (R) between two points is directly proportional to the voltage (V) across the two points.

For a voltage value of 5 Volt and resistor value of 2 ohm, the current through the resistor is 2.5 Amperes or Amps.