Mission
The mission is simple: reduce confusion. Fitness conversations are full of numbers—TDEE estimates, macro splits, protein ranges, body-fat estimates, and rep-max formulas. PhysiqueFormulas exists to show how those values are commonly produced, what assumptions sit underneath them, and what they can (and can’t) tell you.
What You’ll Find Here
The site is built around two things: calculators that make the math visible, and guides that explain how outputs are commonly discussed in training and nutrition contexts—without hype, prescriptions, or “one-size-fits-all” claims.
Tools
Free calculators with clear inputs
Calculators are built around widely referenced methods and designed to be simple on mobile. The goal is not a “score,” but a readable estimate with enough context to interpret it responsibly.
Start here: Browse all calculators.
Education
Guides that explain the model
Articles translate the underlying ideas into plain language—definitions, ranges, tradeoffs, limitations, and why real-world logs often matter more than theory.
Go deeper: Read the latest guides.
Methodology
- Use widely referenced formulas (and name them) so readers can see what’s being used.
- Keep inputs minimal to reduce confusion and improve repeatability.
- Explain outputs with definitions, assumptions, and limitations in normal language.
- Avoid prescriptions — content stays general and educational, not individualized advice.
For example, energy needs are commonly estimated using resting metabolic equations such as Mifflin–St Jeor, then adjusted with widely used activity multipliers. Macronutrient and protein tools translate calorie estimates into ranges commonly discussed in sports nutrition education, while body composition tools use established circumference-based methods (such as the U.S. Navy approach) to illustrate how approximate body-fat estimates are derived.
What “Research-Informed” Means Here
“Research-informed” means the tools reflect methods that show up in widely used fitness education and exercise science discussions. It does not mean the site can measure your physiology, diagnose anything, or predict outcomes. Outputs are estimates that work best when you compare them against real-world logs and trends over time.
Editorial Standards
Pages are written to be readable and specific. No hype, no unrealistic timelines, no “one weird trick.” When a number is an estimate, it’s labeled as an estimate. When a topic has uncertainty, it’s treated like uncertainty.
This site is published and maintained by a single creator. Content is written in an organizational voice to keep the focus on the models, assumptions, and educational usefulness rather than personal branding.
Methods and assumptions are reviewed when calculators are expanded or when common reference models change in how they’re typically discussed. Ads do not influence calculator methodology or editorial conclusions, and there are no pay-to-play rankings.
Privacy, Ads & Monetization
PhysiqueFormulas is free to use. The site may use display advertising to support hosting and ongoing development. Ads do not influence calculator methodology or editorial conclusions.
For details, see the Privacy Policy, Disclaimer, and Affiliate Disclosure.
Reviewed & Updated
Calculator logic and on-page content reviewed for clarity and educational accuracy. Last review: December 2025.
About Page FAQ
Who runs PhysiqueFormulas?
PhysiqueFormulas is an independent site published and maintained by a single creator. Content is written in an organizational voice to keep the focus on clarity, methodology, and educational usefulness rather than personal branding.
Are the tools on PhysiqueFormulas free to use?
Yes. The calculators and guides are free to access and designed for general educational use.
Does PhysiqueFormulas provide medical advice?
No. Content on PhysiqueFormulas is general educational information and model-based estimates. It is not medical, dietary, mental health, or training advice.
Next: explore the Fitness Calculators or read the Blog.