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Frequently Asked Questions
Are all calculators free?
Yes — every single one. No sign-up, no subscription, no "premium" tier. Free now, free forever.
Is my health data stored anywhere?
No. Every calculation happens entirely in your browser. The numbers you type never leave your device — I have no server storing any of it.
Can I suggest a new calculator?
Please do. Select "Suggest a Calculator" in the dropdown. I've added several tools based on requests and I look at all of them.
I found an error in a result. What should I do?
Select "Report a Bug" and tell me which calculator, what you entered, and what you expected. I take accuracy seriously and fix confirmed bugs quickly.
Can I use your calculators on my own website?
Get in touch via "Business Enquiry" and we can talk about it.
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36 free health calculators. No account needed. Just numbers.
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