Daily Energy (TDEE) Calculator
Calculate your Total Daily Energy Expenditure and Basal Metabolic Rate based on activity level.
How It Works
The calculator computes your BMR using the Mifflin-St Jeor equation: Men = 10 x weight(kg) + 6.25 x height(cm) - 5 x age - 161 + 166. It then multiplies BMR by an activity factor (1.2 for sedentary up to 1.9 for extremely active) to estimate your TDEE. Both BMR and TDEE are shown in calories (kcal) and kilojoules (kJ).
Frequently Asked Questions
What is TDEE?
Total Daily Energy Expenditure is the total number of calories you burn in a day, including your Basal Metabolic Rate (calories at complete rest), thermic effect of food (digestion), and physical activity. TDEE determines how many calories you need to eat to maintain your current weight.
What is the difference between BMR and TDEE?
BMR (Basal Metabolic Rate) is the calories your body burns just to keep you alive at rest — breathing, circulation, cell production. TDEE is BMR multiplied by an activity factor. For a moderately active person, TDEE is roughly 1.55x their BMR.
Which BMR formula is most accurate?
The Mifflin-St Jeor equation is considered the most accurate for most people and is recommended by the Academy of Nutrition and Dietetics. It was developed in 1990 and tends to estimate BMR within 10% of measured values.
How many calories does the average Australian need?
General guidelines suggest around 2,000-2,200 kcal/day for adult women and 2,400-2,800 kcal/day for adult men, depending on age and activity level. Individual needs vary significantly — use your TDEE as a personalised starting point.
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