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## Related Tools

- Current & resistance to power (DC)
- Power & current to resistance (DC)
- Power & voltage to current (DC)
- Voltage & resistance to current (DC)
- Power & resistance to voltage (DC)

## User Guide

Use this calculator to determine the current in microamp, milliamp or ampere units, generated by a direct current (DC) electrical circuit for a specified power and resistance. Two conversion scales show how the current will vary when the power or resistance is changed independently, whilst the other remains fixed with the entered value.

### Formula

The formula used by this calculator to determine the DC current from the power and resistance of the circuit is:

I = √ (P / R)

#### Symbols

- I = Current (DC)
- P = Electrical power (DC)
- R = Resistance (DC)

### Power (P)

This is the electrical power generated in a DC electrical circuit.

### Resistance (R)

This is the electrical resistance of the DC electrical circuit

### Current (I)

This is the electrical current that will flow through the DC electrical circuit with the specified power and resistance.