What Is a Calorie Calculator?
A calorie calculator estimates your Total Daily Energy Expenditure (TDEE) based on personal metrics such as age, weight, height, gender, and activity level. By applying the Mifflin-St Jeor equation—one of the most validated formulas in nutrition science—it provides a reliable baseline for daily caloric needs.
How to Use This Calorie Calculator
- Enter your age, weight (in kg), and height (in cm).
- Enter your gender (1 for male, 2 for female).
- Click “Calculate” to see your Basal Metabolic Rate (BMR) and a TDEE table showing estimated daily calories for five activity levels—from sedentary to very active.
Key Concepts
The Mifflin-St Jeor equation calculates BMR: for men, BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age + 5; for women, BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age − 161. TDEE is obtained by multiplying BMR by an activity factor ranging from 1.2 (sedentary) to 1.9 (very active). Always consult a healthcare professional before making significant dietary changes.
Frequently Asked Questions
How accurate is the Mifflin-St Jeor equation?
Research shows it predicts BMR within 10% for most adults, making it the preferred formula recommended by the Academy of Nutrition and Dietetics. Individual variation may apply.
Should I eat below my TDEE to lose weight?
A moderate calorie deficit of 300–500 kcal below TDEE is generally considered safe for gradual weight loss. Extreme deficits can slow metabolism and should be avoided. Consult a registered dietitian for personalized advice.
Does this account for exercise?
Yes. The result includes a TDEE table that applies five different activity multipliers to your BMR, so you can find the row that best matches your exercise habits.