Body Calculator is a collection of free, easy-to-use calculators for understanding your body and health — BMI, calories, TDEE, body fat, macros, protein needs, and more.

Our goal is simple: give people quick, accurate estimates using well-established formulas, without clutter, popups, or unnecessary sign-ups.

What We Offer

Every calculator on this site is:

• Free to use — no account or subscription required

• Based on established formulas — sourced from widely recognized health and fitness references

• Simple and fast — enter your numbers, get your results, no distractions

What We're Not

Body Calculator is an educational and informational tool. We are not a medical service, and our calculators do not replace advice from a doctor, dietitian, or other qualified health professional. See our Disclaimer for more detail.

Questions or Feedback?

We're always looking to improve. If you have a suggestion, spot an error, or just want to say hi, visit our Contact page.