The website PC Part Picker is widely regarded as the standard bearer for PC part choosing in general, and it comes with a compatibility checker for every component

Our pick

PC Part Picker

PC Part Picker is the de-facto power-supply unit (PSU) calculator website.

When it comes to choosing PC parts, PC Part Picker is the ultimate choice. Offering a perpetually-updated compatibility list, you can ensure you'll pick the right PSU here.

Who should use PC Part Picker

Even the most expert PC builders need to look up compatibility from time to time, and PC Part Picker remains the best place to check whether your PC build is going to work as intended.

Reasons to use

  • Constantly updated list of PC parts
  • PSU limits clearly shown
  • Completely free
  • Crowd-sourced ratings

Reasons not to use

  • Might be a bit daunting for beginners

PC Part Picker is the best PSU calculator

PC Part Picker is a free tool that helps you easily plan out a PC build listing virtually every popular, readily available PC component on the market. If you have a specific GPU or PC case in mind, for example, PC Part Picker will help you plan around that, offering compatibility warnings if you choose a component that isn't compatible with the overall build.

As far as PSU calculations go, PC Part Picker also lists the expected wattage on the side of the list, giving you an estimated total power use while making recommendations for specific power supplies.

PC Part Picker has a login system that offers some mild social networking features, allowing you to record and publish your own builds while getting ideas from others in the community.

There's also a range of beginner's guides to help you get acquainted with PC building in general, allowing you to find builds that suit your needs and budget.

Bottom line

PC Part Picker is the obvious choice when it comes to making PSU calculations but also PC component choices in general. Its perpetually-updated list is second to none, and its active community ensures that none of the information or ratings slip out of date, leading to PC part headaches down the line. You can sign up and sign in to store your favorite builds while browsing completed builds from others in the community for added inspiration. There are a few alternatives out there but nothing really comes close to PC Part Picker.

Credits — The team that worked on this guide

Jez Corden is a full-time writer for Windows Central, focusing on Xbox, Surface, and Windows PC. He spends the vast majority of his time gaming, or writing about gaming, with a mission to provide gamers in the Microsoft ecosystem the best and most up-to-date info possible.

Rich Edmonds is a word conjurer and editor at Windows Central, covering everything related to Windows, gaming, and hardware.

This post may contain affiliate links. See our disclosure policy for more details.

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