Our calorie calculator uses the Mifflin-St Jeor equation to calculate your Basal Metabolic Rate (BMR) - the calories your body burns at rest. Then we factor in your activity level to determine your Total Daily Energy Expenditure (TDEE).
BMR Formula (Mifflin-St Jeor)
Men: BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age in years) + 5
Women: BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age in years) - 161
Understanding Your Results
BMR (Basal Metabolic Rate): The calories your body burns at complete rest. This is the minimum energy needed for vital functions like breathing and circulation.
TDEE (Total Daily Energy Expenditure): Your actual daily calorie needs including all activities. This is your maintenance calorie level.
Weight Loss: We subtract 500 calories/day for 1 lb/week loss (3500 calories = 1 lb fat)
Frequently Asked Questions
What is TDEE?
TDEE stands for Total Daily Energy Expenditure. It's the total number of calories your body burns in a day, including your basal metabolic rate (BMR) plus calories burned through activity and digestion.
How accurate is this calorie calculator?
This calculator uses the Mifflin-St Jeor equation, which is considered the most accurate formula for estimating BMR and TDEE. However, individual results may vary by 5-10% due to genetic factors and metabolism variations.
Should I use metric or imperial units?
Both systems work identically - the calculator automatically converts between them. Use whichever you're most comfortable with. The calculator can auto-detect based on your browser settings.
How many calories should I eat to lose weight?
To lose 1 pound per week, subtract 500 calories from your TDEE (maintenance calories). For 2 pounds per week, subtract 1000 calories. Never go below 1200 calories/day for women or 1500 for men without medical supervision.