About TDEE & BMR
Total Daily Energy Expenditure (TDEE) is the total number of calories you burn each day. It is calculated by multiplying your Basal Metabolic Rate (BMR) — the energy your body needs at rest — by an activity multiplier. This calculator uses the Mifflin-St Jeor equation, which is considered one of the most accurate formulas for estimating BMR.
FAQ
Q: What is BMR?
A: BMR (Basal Metabolic Rate) is the number of calories your body needs to perform basic life-sustaining functions such as breathing, circulation, and cell production while at complete rest.
Q: What is TDEE?
A: TDEE (Total Daily Energy Expenditure) is the total number of calories you burn per day, including all physical activities. It is calculated by multiplying your BMR by an activity factor.
Q: What is the Mifflin-St Jeor equation?
A: The Mifflin-St Jeor equation is a formula for estimating BMR. For males: BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age + 5. For females: BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age − 161.
Q: How accurate is this calculator?
A: The Mifflin-St Jeor equation is considered the most reliable formula for estimating BMR for most adults. However, individual metabolism can vary due to genetics, body composition, hormonal factors, and other variables.
Q: How should I use the calorie targets?
A: To lose weight, aim for a deficit of about 500 kcal/day below your TDEE (approximately 0.45 kg/week loss). To gain weight, add about 500 kcal/day above your TDEE. Always consult a healthcare professional before making significant dietary changes.