Free Nutrition & Fitness Calculators
Understanding your body's calorie needs is one of the most powerful tools for managing your weight and improving your health. Our free calculators use established scientific formulas to give you personalised estimates for your daily calorie requirements, healthy weight range, and calories burned during exercise.
Use the calculators below alongside our food database of 350,000+ foods and free Food Tracker to get a complete picture of your daily energy intake and expenditure.
Daily Calorie Needs Calculator (TDEE)
Find out exactly how many calories your body needs each day based on your age, sex, weight, height, and activity level. This calculator uses the Mifflin-St Jeor equation — the most accurate formula recommended by the Academy of Nutrition and Dietetics — to estimate your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE).
Results include:
- Your BMR — calories needed at complete rest
- Your TDEE — calories to maintain your current weight
- Calorie targets for mild weight loss (−0.5 lb/week)
- Calorie targets for weight loss (−1 lb/week)
- Calorie targets for weight gain (+1 lb/week)
BMI Calculator
Calculate your Body Mass Index (BMI) — a widely used screening tool that estimates whether your body weight is in a healthy range for your height. Enter your weight in pounds and height in feet and inches to get your BMI score and see which category it falls into.
Results include:
- Your BMI score
- Your weight category (Underweight, Healthy, Overweight, or Obese)
- Explanation of what your result means and what to do next
Calories Burned Calculator
Find out how many calories you burn doing 78 popular exercises including running, walking, cycling, swimming, HIIT, and more. Enter your weight and exercise duration to get a personalised estimate based on your body weight.
Exercises covered include:
- Running at multiple pace levels
- Walking at multiple pace levels
- Cycling, Swimming, HIIT, Hiking
- Sports, martial arts, yoga, and many more
More Calculators Coming Soon
We are continually adding new calculators to help you better understand your nutrition and fitness. Planned additions include a macro calculator, ideal weight calculator, and more. Check back soon or sign up for a free account to be notified when new tools are available.
Once you know your daily calorie target, use our food database to track what you eat. CalorieDetails has over 350,000 foods with full nutrition breakdowns.
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