---
title: joules
framework: foundation
role: symbol
role_heading: Type Property
path: foundation/unitenergy/joules
---

# joules

The joules unit of energy.

## Declaration

```swift
@NSCopying class var joules: UnitEnergy { get }
```

## See Also

### Accessing Predefined Units

- [kilojoules](foundation/unitenergy/kilojoules.md)
- [kilocalories](foundation/unitenergy/kilocalories.md)
- [calories](foundation/unitenergy/calories.md)
- [kilowattHours](foundation/unitenergy/kilowatthours.md)