---
title: UnitElectricResistance
framework: foundation
role: symbol
role_heading: Class
path: foundation/unitelectricresistance
---

# UnitElectricResistance

A unit of measure for electric resistance.

## Declaration

```swift
class UnitElectricResistance
```

## Overview

Overview You typically use instances of UnitElectricResistance to represent specific quantities of electric resistance using the NSMeasurement class. Electric Resistance Electric resistance is the difficulty of passing an electric current through a conductor. The SI unit for electric resistance is the ohm (Ω), which is derived as the electric resistance that produces one ampere of current between two points in conductor with one volt of electric potential difference (1Ω = 1V/1A). The UnitElectricResistance class defines its baseUnit() as ohms, and provides the following units, which are initialized using UnitConverterLinear converters with the specified coefficients:  |  |  |   |  |  |   |  |  |   |  |  |   |  |  |   |  |  |

## Topics

### Accessing the Base Unit

- [baseUnit()](foundation/dimension/baseunit().md)

### Accessing Predefined Units

- [megaohms](foundation/unitelectricresistance/megaohms.md)
- [kiloohms](foundation/unitelectricresistance/kiloohms.md)
- [ohms](foundation/unitelectricresistance/ohms.md)
- [milliohms](foundation/unitelectricresistance/milliohms.md)
- [microohms](foundation/unitelectricresistance/microohms.md)

## Relationships

### Inherits From

- [Dimension](foundation/dimension.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSCoding](foundation/nscoding.md)
- [NSCopying](foundation/nscopying.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)
- [NSSecureCoding](foundation/nssecurecoding.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Electricity

- [UnitElectricCharge](foundation/unitelectriccharge.md)
- [UnitElectricCurrent](foundation/unitelectriccurrent.md)
- [UnitElectricPotentialDifference](foundation/unitelectricpotentialdifference.md)