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## Related Tools

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- Voltage & resistance to current (DC)
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- Power & current to resistance (DC)
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## User Guide

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

### Formula

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

R = V / I

#### Symbols

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

### Voltage (V)

This is the DC voltage or electrical potential difference applied to or generated from the electrical circuit.

### Current (I)

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

### Resistance (R)

This is the electrical resistance of the DC electrical circuit with the entered values for voltage and current.