By Dr. Ajit Kumar, MD (Medicine) — Founder, Medimadad. About the Author | Editorial Policy
Knowing your daily calorie needs is the foundation of any nutrition goal, whether you’re aiming to lose weight, gain muscle, or simply maintain your current health. This calculator uses the Mifflin-St Jeor equation — the formula recommended by the Academy of Nutrition and Dietetics as the most accurate estimate available for healthy adults.
Daily Calorie & BMR Calculator
This calculator uses the Mifflin-St Jeor equation, the formula recommended by the Academy of Nutrition and Dietetics for estimating energy needs in healthy adults. Individual needs vary with muscle mass, metabolic health, and other factors — this is educational information, not a personalized prescription. Consult a healthcare professional or registered dietitian for individualized guidance.
What Is BMR and Why Does It Matter?
Your Basal Metabolic Rate (BMR) is the number of calories your body needs at complete rest just to keep essential functions running — breathing, circulation, cell repair. Your Total Daily Energy Expenditure (TDEE) adds your activity level on top of that baseline, giving you a realistic picture of how many calories you actually burn in a day.
Using Your Results
To maintain your current weight, eating around your TDEE is the target. For gradual, sustainable weight loss, a deficit of 300–500 calories per day below your TDEE is a widely used and evidence-supported starting point — aggressive deficits beyond this often backfire through muscle loss and metabolic slowdown. For muscle gain, a modest surplus of 200–300 calories combined with resistance training tends to work better than large surpluses.
Frequently Asked Questions
How accurate is this calculator?
The Mifflin-St Jeor equation is considered the most accurate prediction formula available for estimating BMR in the general population, but it’s still an estimate. Actual metabolic rate varies with muscle mass, genetics, hormone levels, and other individual factors — use this as a starting point, then adjust based on real-world results over a few weeks.
Should I eat exactly my TDEE every day?
No need to hit the number precisely every single day. Weekly averages matter more than daily perfection — a few hundred calories above or below on any given day is normal and expected.
Why do I need to know my activity level?
Activity level is often the biggest source of error in calorie calculations. Be honest rather than optimistic about how active you really are — most people overestimate their activity level, which leads to overeating relative to their real needs.
Related Reading
Once you know your calorie target, protein intake is the next most important number for body composition goals. Our Whey vs Plant Protein guide breaks down which protein source makes sense for Indian diets and goals.
Related Health Tools
Get more free health tools and guides by email
Join thousands of readers. No spam. Unsubscribe anytime.
Frequently Asked Questions
What is the difference between BMR and TDEE?
BMR (Basal Metabolic Rate) is the number of calories your body needs at complete rest just to maintain basic functions like breathing and circulation. TDEE (Total Daily Energy Expenditure) adds your activity level on top of BMR to estimate your full daily calorie needs.
How accurate is the Mifflin-St Jeor equation?
The Mifflin-St Jeor equation is widely regarded by the Academy of Nutrition and Dietetics as the most reliable BMR formula for the general healthy adult population, typically accurate within about 10 percent for most people. Individual metabolism can still vary based on factors like muscle mass, hormonal conditions, and genetics.
Should I eat exactly at my TDEE?
It depends on your goal. Eating at your TDEE tends to maintain your current weight, eating below it typically results in weight loss, and eating above it typically results in weight gain. Any significant, sustained calorie deficit or surplus should ideally be discussed with a healthcare provider or dietitian, especially for people with underlying health conditions.
Does this calculator account for medical conditions affecting metabolism?
No. Conditions such as thyroid disorders can significantly affect metabolic rate. This calculator provides a general population-based estimate only and is not a substitute for individualized medical or nutritional advice.