Ohm's Law Calculator

Ohm's law states that the current through a conductor between two points
is directly proportional to the potential difference across the two points.

V = I × R

Which means : Voltage = Current x Resistance

The calculator below is based on the Ohm's law formulas.

Enter at least 2 values in the fields below then click on the ’Calculate’ button

  V   ( Volts => V )
  Ω   ( Ohms => R )
  A   ( Amps => I )
  W   ( Watts => P )
    

See all variations of the Ohm's law formula
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