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# Ohm's Law Calculator

## Current I

The current is a scalar physical quantity determined by the electric charge passing through the cross section of the conductor per unit of time. Based on Ohm's law, the current I is directly proportional to the applied voltage U and inversely proportional to the resistance R. The SI unit of electric current is the ampere.
Voltage U =
Resistance R =
The SI unit of current I

## Voltage U

Voltage is a scalar physical quantity characterized by work when moving a single positive charge on a given section of the circuit. Voltage is a generalized concept of the potential difference between the beginning and the end of a section of a conductor. The SI unit of electric current is the volt.
Current I =
Resistance R =
The SI unit of voltage U

## Resistance R

Resistance is a physical quantity that determines the ability of a conductor to prevent the passage of electric current. The SI unit of electric current is the Ohm. The resistance of a conductor depends on the material of which the conductor is made, and also on its shape and size.
Voltage U =
Current I =
The SI unit of resistance R

See also