Our Mission

FFMI Calculator is built to help people understand muscle mass and body composition using clear, transparent formulas and evidence-based interpretation. Our goal is to make useful tools and educational guides that are easy to use and easy to verify.

We believe fitness information should be accessible to everyone, regardless of their background or expertise level. That's why all our calculators are free to use, and we explain the science behind every formula.

Who We Are

We are a team of fitness enthusiasts, data analysts, and web developers passionate about making body composition science accessible. Our content is reviewed for accuracy and updated regularly based on the latest research.

Content Review Process

All calculators and guides are reviewed for scientific accuracy before publication.

Regular Updates

We monitor new research and update our content when evidence changes recommendations.

Editorial Standards

We take accuracy seriously. Here's how we ensure our content meets high standards:

Evidence-Based Content

We cite peer-reviewed research and reputable sources. All formulas are derived from published studies.

Transparent Methodology

We explain inputs, formulas, and limitations directly on each calculator page so you can verify our work.

Regular Updates

We review and update guides when newer evidence changes practical recommendations.

Key Research References

Our FFMI calculator and interpretations are based on peer-reviewed research, including:

1.Kouri et al. (1995) - "Fat-free mass index in users and nonusers of anabolic-androgenic steroids" - Clinical Journal of Sport Medicine
2.Schutz et al. (2002) - "Fat-free mass index and fat mass index percentiles in Caucasians aged 18-98 y" - International Journal of Obesity
3.VanItallie et al. (1990) - "Height-normalized indices of the body's fat-free mass and fat mass" - American Journal of Clinical Nutrition

Full reference list available on our Research page.

Medical Disclaimer

This website provides educational information and calculators only. It is not medical advice. The tools and content on this site are intended for general informational purposes and should not be used as a substitute for professional medical advice, diagnosis, or treatment.

If you have health concerns or are planning significant changes to your fitness or nutrition regimen, please consult a qualified healthcare professional, registered dietitian, or certified fitness trainer.

Contact Us

We welcome feedback, corrections, and suggestions. If you notice an error in our calculations or have ideas for improvements, please let us know.

General Inquiries & Feedback

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