About MyFitCalculator

MyFitCalculator.com provides free, evidence-based health and fitness calculators. Every formula is grounded in peer-reviewed research and validated clinical guidelines — including WHO standards, NHMRC Australian guidelines, and Mifflin-St Jeor BMR equations.

Our Principles

• Evidence-based: Every formula is referenced and explained on each calculator page
• Transparent: We show our working — the formula, the source, and the limitations
• Accessible: No signup, no paywall, mobile-first design built for phones
• Honest: We tell you where calculators have limitations, not just their outputs

Our Calculators

We currently offer 18 free calculators across body composition, calorie science, nutrition, womens health, and lifestyle categories.

Medical Disclaimer

All results are for informational purposes only. Read our full medical disclaimer.