About HealthCalculators.xyz
Free, evidence-based health calculators built on peer-reviewed research and clinical guidelines. No accounts, no paywalls.
Our Mission
HealthCalculators.xyz provides free, accurate health and wellness calculators that help people make informed decisions about their bodies. Every calculator on this site is built using formulas derived from peer-reviewed medical research, clinical guidelines, and established health standards.
We believe health information should be accessible, transparent, and grounded in science — not marketing or speculation. Our tools give you a starting point for understanding your health, not a replacement for professional medical advice.
Editorial Standards
As a health information site, we hold ourselves to strict editorial standards. Our full standards, source requirements, review process, and corrections policy are detailed in our Editorial Policy.
Our Methodology
Each calculator follows a rigorous development process:
Research First
We identify the established medical formulas, clinical guidelines, or peer-reviewed studies before writing a single line of code.
Transparent Formulas
We cite specific studies and formulas — Mifflin-St Jeor for TDEE, SURMOUNT trials for Mounjaro, AR 600-9 for Army body fat.
Conservative Estimates
When clinical data shows a range, we default to conservative projections rather than optimistic ones.
Limitations Stated
Every calculator includes a disclaimer noting what it can and cannot tell you, and when to consult a healthcare professional.
What We Cover
Nutrition & Diet
TDEE, protein intake, caloric macro planning, carb cycling, water intake, restaurant nutrition trackers
Weight Loss Medications
Ozempic, Mounjaro (tirzepatide), semaglutide projections based on clinical trial data
Cosmetic & Aesthetic
Breast implant sizing and cost, Botox dosage, lip filler cost, liposuction estimates
Fertility & Pregnancy
IVF due dates, fertility windows, child growth tracking, newborn weight, dog pregnancy
Health & Wellness
BMI, sleep cycles, BAC, vitamin D, lipid panels, baldness risk, height prediction
Fitness & Body Composition
Body fat percentage, calories burned, Army body fat, ideal body weight, creatine hydration
Content Integrity
Every calculator page on this site identifies the specific formula or methodology it uses and cites the original source — whether that's a peer-reviewed study (e.g., Mifflin-St Jeor for TDEE), a clinical trial dataset (e.g., SURMOUNT trials for tirzepatide), or an institutional guideline (e.g., WHO BMI classifications). We do not invent formulas or extrapolate beyond what the published evidence supports.
Our editorial independence is non-negotiable. Calculator formulas, health claims, and recommendations are never influenced by advertisers. Advertising on this site (served via Google AdSense) is clearly separated from editorial content.
If you find an error in any calculator, formula, or health claim, email calculatordirectory@gmail.com with the page URL and a description of the issue. We investigate every report and correct confirmed errors within 48 hours. See our full Editorial Policy for details.
Medical Disclaimer
The calculators and articles on this site are for informational and educational purposes only. They are not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making health decisions based on calculator results.
Our tools use population-level data and general formulas. Individual results vary based on genetics, medical history, medications, and other factors that no online calculator can fully account for.
Contact
For questions, corrections, or calculator suggestions: calculatordirectory@gmail.com