##  [Power Density](/power-density) 

  ##  [Power Density](https://engineering.quantumdictionary.io/power-density-0) 

  

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**Engineering & Applied Technologies Dictionary**

 







 

 

 

 



 

 

 

 

Definition

The instantaneous or sustained electrical or mechanical power a device or subsystem can deliver (or absorb) per unit physical volume, typically expressed in watts per cubic metre (W·m⁻3) or watts per litre (W·L⁻1); the metric compares devices when volumetric space is the constraining resource and excludes separate auxiliary equipment unless explicitly included in the referenced volume.