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## User Guide

Use this calculator to determine the current in microamp, milliamp or amp units in a direct current (DC) electrical circuit with a specified voltage and resistance. Two conversion scales show how the current in an electrical circuit changes as voltage or resistance is changed independently, whilst keeping the other constant.

### Formula

The formula used by this calculator to determine the current in a DC electrical circuit from the voltage and resistance is:

I = V / R

#### Symbols

- I = Current (DC)
- V = Voltage (DC)
- R = Electrical resistance (DC)

### Voltage (V)

This is the DC voltage or electrical potential difference applied to or generated by the electrical circuit with the entered values for current and resistance.

### Resistance (R)

This is the electrical resistance of the DC electrical circuit

### Current (I)

This is the electrical current flowing through the DC electrical circuit.