High power usage drives up heat, impacts the efficiency of your cooling solution and your components, and puts more stress on your power supply. So how much power does your PC consume?

Use an online calculator If you want to just get a rough idea of how much power your system uses, then a quick calculator can save you a lot of hassle with taking measurements.

The new Calculator in Windows 11/10 is elegant and feature-rich. Learn how to use it in the Standard, Scientific, Programmer and Conversion modes.

When building your own desktop computer from scratch, how do you know what size power supply to get? The Newegg Power Supply Calculator figures it out for you with ease.