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pp calculator is free, private, and ad-free. If it earned a laugh — or a little perspective — you can help keep it that way.

There's no paywall, no ads, and your measurements never leave your device. Running a site still costs something, though: edge hosting, the dataset proxy that powers every percentile, and the time to add new studies and features. A small donation keeps all of that going.

What your support pays for

Keeping the calculator free and ad-free, forever.
Hosting and the read-only data service behind the percentiles.
Adding more datasets, charts, and quality-of-life features.
Never selling, storing, or even seeing your numbers.

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Payment processing is being set up — these buttons go live shortly. Thank you for even considering it.

The best free way to help in the meantime: send the calculator to a friend who could use a confidence boost.