Free PC Fan Tools

Quick answers to the fan questions that come up mid-build. They're free, they work in your browser, and there's nothing to sign up for.

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  Fan noise calculator

  Add up your fans' noise ratings the right way. Decibels don't add like normal numbers.

  Open the tool →
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  Fan header calculator

  Check whether a splitter of fans is safe on one motherboard header before you plug it in.

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  Fan direction checker

  Tell from the fan itself which way it blows, and whether that's right for where it sits.

  Open the tool →