To get a complete picture of your PC's power usage, you need a combination of tools.
4/5 Stars. The choice for data nerds and enthusiasts, but overkill for the average user.
There are several software tools available that can estimate your PC's power consumption:
For 99.9% of users, you can stop at Level 3. But for the overclockers chasing world records, or engineers validating a PSU review, they go deeper.