Our Mission
Nutryio exists for one reason: to give everyone access to the precision tools that were previously locked behind expensive nutrition software, gym memberships, or consultations with specialists. Health decisions shouldn't require a degree in biochemistry or a personal trainer on speed dial.
We believe that accurate, personalised information — delivered clearly and for free — helps people make smarter decisions about their bodies. That's the entire idea behind Nutryio.
What We Build
Nutryio is home to 156+ free health and fitness calculators spanning nutrition, body composition, cardio performance, strength training, sleep, supplementation, cooking, and more. Every tool is built on peer-reviewed science and regularly reviewed to ensure accuracy.
Our blog complements the calculators with in-depth, plainly written guides covering the topics our users care about most — from understanding macros and TDEE to interpreting heart rate zones and building muscle effectively.
Our Approach to Accuracy
Every calculator on Nutryio is grounded in published research. We cite established formulas — Harris-Benedict, Mifflin-St Jeor, Epley, Katch-McArdle, and many others — and apply them faithfully. Where multiple validated methods exist, we provide options so you can choose the approach most relevant to your situation.
We are transparent about the limitations of calculators. Population-derived formulas give excellent estimates for most people, but individual variation exists. Our results pages explain what each number means, what factors influence it, and when to consult a healthcare professional for clinical measurement.
Who We Are
Nutryio was founded by a team passionate about health, fitness, and making science accessible. Our editorial team comprises nutrition enthusiasts, fitness professionals, and researchers dedicated to producing content that is accurate, nuanced, and free of the hype that pervades so much of the wellness industry.
We are independently operated and do not accept sponsorship from supplement brands, food companies, or pharmaceutical interests. Our recommendations are based solely on evidence.
Our Content Standards
- All calculators reference validated, peer-reviewed formulas with source citations.
- Blog content is reviewed against current dietary guidelines (WHO, NIH, USDA, EFSA) before publication.
- We update tools and articles when new research changes best practices.
- We distinguish clearly between established science and emerging or contested research.
- We never recommend specific supplement brands or endorse commercial products.
Medical Disclaimer
Nutryio provides general health and fitness information for educational purposes. The content on this site — including calculators, blog articles, and guides — is not intended to be, and should not be used as, a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making significant changes to your diet, exercise routine, or supplementation.
Contact Us
We welcome feedback, corrections, and questions. If you notice an error in a calculator, have a suggestion for a new tool, or want to get in touch, visit our contact page.