Free fitness calculators — BMI, Body Fat, Calories & Age

Quick, private calculations right in your browser. No data is saved or sent unless you submit the contact form.

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Calculators

BMI Calculator

Body Fat (US Navy)

Calorie (TDEE) Calculator

Age Calculator

About Us

HealthTools is a lightweight, privacy-first set of fitness calculators built to help you make quick decisions. Calculations run entirely in your browser — we do not collect or store results unless you choose to submit them through the contact form.

Built with simple HTML, CSS and JavaScript. Use it, modify it, and host it freely.

Contact Us

Have feedback or want help integrating this tool? Send a message and we'll get back to you.

Privacy Policy

This site runs calculations locally in your browser. We do not store or transmit calculation inputs or results. If you submit the contact form, your name and email are sent using the method you connect on your server (example implementations are not included). If you plan to deploy publicly, update the contact submission to point to your server or a trusted third-party form service and ensure you have a GDPR/CCPA-compliant workflow if applicable.

This privacy text is a template; please replace with your legal policy suited to your jurisdiction before using the site commercially.