Dr. Lisa Nguyen, RDN, CSSD
Board-Certified Sports Dietitian
Dr. Lisa Nguyen is a Registered Dietitian Nutritionist (RDN) and Board-Certified Specialist in Sports Dietetics (CSSD) with over 12 years of clinical and performance nutrition experience. She has worked with collegiate athletes, professional sports teams, and thousands of individual clients ranging from beginners to elite competitors.
Our Mission
My Calorie Calculator was built on a simple premise: nutrition science should be accessible to everyone, not just people who can afford a registered dietitian or who understand complex research papers.
Every calculator on this site uses validated scientific formulas — the same ones registered dietitians use in clinical practice. The Mifflin-St Jeor equation, WHO BMI standards, ACSM protein recommendations — these tools exist in peer-reviewed literature, and we've made them free and instant to use.
No signups. No paywalls. No ads cluttering the experience. Just science-based tools that give you a useful starting point for your nutrition journey.
What We Provide
Calorie Calculator
Mifflin-St Jeor based calorie needs for any goal
TDEE Calculator
Total daily energy expenditure with activity factors
Macro Calculator
Protein, carb, and fat targets with multiple presets
BMI Calculator
Body Mass Index with visual scale and context
Protein Calculator
Evidence-based protein recommendations by goal
Deficit Calculator
Calorie deficit planning with safety checks
Food Calorie Lookup
USDA-sourced nutrition data for 120+ foods
Our Commitment to Accuracy
Every formula we use is sourced from peer-reviewed literature or established scientific organizations:
- Mifflin-St Jeor equation (Am J Clin Nutr, 1990)
- WHO/CDC BMI classification standards
- ACSM protein recommendations for athletes
- USDA FoodData Central for all nutrition values
- 3,500 calorie-per-pound fat loss estimate (widely accepted clinical approximation)
Medical Disclaimer
The calculators on this site are for educational and informational purposes only. They are not intended as medical advice, diagnosis, or treatment. Results are estimates based on population averages and may not apply to your individual situation. Always consult a qualified healthcare professional or registered dietitian before making significant changes to your diet, especially if you have a medical condition.
Contact
Have feedback or found an error? We welcome corrections and suggestions to keep our calculators as accurate as possible. Reach out through the contact form or email us directly.