Tiny Health Tools started from a simple frustration: most health calculators on the web are slow, sign-up gated, buried in ads, or vague about where their numbers come from. This site is the opposite.
Every tool runs entirely in your browser. There are no accounts, no cookies, no analytics trackers, and no external requests. The formulas are standard, the limitations are stated plainly, and the output is designed to be read and understood in seconds.
Principles
- No gatekeeping. Every calculator works without email, login, or payment.
- Show the work. Each tool explains the formula and what it can and cannot tell you.
- Privacy by default. Your data never leaves the page.
- Fast and lightweight. Plain HTML, CSS, and JavaScript. No frameworks or build steps.
Who this is for
This site is for anyone who wants a quick, well-explained estimate for common health and fitness questions: calorie needs, protein targets, heart-rate training zones, caffeine timing, sleep timing, hydration, body-composition metrics, and supplement dosing.
What it is not
Tiny Health Tools is not a substitute for professional medical advice, diagnosis, or treatment. The calculators are educational tools based on population formulas. Individual needs vary, sometimes significantly. If you have a medical condition, are pregnant, take medications, or are planning major changes to diet or exercise, consult a qualified health professional.
Contact
Found an error or have a suggestion? The site is intentionally small, so feedback is welcome. Reach out through the channels listed on this domain.