Calorie Calculator
Calculate the number of calories you need to consume each day to maintain, lose, or gain weight based on your activity level.
Exercise: 15-30 minutes of elevated heart rate activity.
Intense exercise: 45-120 minutes of elevated heart rate activity.
Very intense exercise: 2+ hours of elevated heart rate activity.
Food Energy Converter
The following converter can be used to convert between Calories and other common food energy units.
Understanding Calories & Energy
What is a Calorie?
A calorie is a unit of energy. In nutrition, we typically refer to "Calories" (with a capital C), which are actually kilocalories (kcal). One Calorie equals 1,000 small calories or approximately 4.184 kilojoules. Calories in food provide the energy our bodies need for everything from breathing to running marathons.
BMR vs TDEE
Basal Metabolic Rate (BMR) is the number of calories your body needs to perform basic life-sustaining functions like breathing, circulation, cell production, and nutrient processing. BMR accounts for about 60-75% of daily calorie expenditure.
Total Daily Energy Expenditure (TDEE) is your BMR plus the calories burned through physical activity and the thermic effect of food (energy used for digestion). TDEE represents the total calories you burn in a day.
Calorie Balance for Weight Management
Maintain Weight
Consume calories equal to your TDEE
Lose Weight
Create a calorie deficit (eat less than TDEE)
Gain Weight
Create a calorie surplus (eat more than TDEE)
Safe Weight Loss Guidelines
- Aim for 0.5-1 kg (1-2 lbs) per week for sustainable weight loss
- Don't go below 1,200 calories/day for women or 1,500 for men without medical supervision
- Combine calorie reduction with physical activity for best results
- Focus on nutrient-dense foods rather than just cutting calories
- Stay hydrated - sometimes thirst is mistaken for hunger
Frequently Asked Questions
Related Calculators
Disclaimer
This calculator provides estimates for informational purposes only. Individual calorie needs can vary based on metabolism, muscle mass, hormones, and other factors. Consult a healthcare provider or registered dietitian before making significant changes to your diet.