Calorie Calculator
Calculate your Total Daily Energy Expenditure (TDEE) based on your BMR and activity level using the Mifflin-St Jeor equation — the most accurate formula for most adults.
Calculator
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The interactive calculator for Calorie Calculator is under development. The formula, worked examples, and FAQ below are already available for reference.
Accuracy & Sources
Last reviewed: April 2026. Formula source: Mifflin MD, St Jeor ST, Hill LA, Scott BJ (1990). American Journal of Clinical Nutrition.. All calculations run in your browser. No data is sent to any server.
Frequently Asked Questions
TDEE (Total Daily Energy Expenditure) is the total number of calories you burn in a day — your BMR multiplied by an activity factor. To maintain weight, eat at your TDEE. To lose weight, eat below it; to gain, eat above it.
The Mifflin-St Jeor equation (1990) is considered the most accurate BMR formula for most adults. It accounts for weight, height, age, and sex. The Harris-Benedict equation is also commonly used but tends to slightly overestimate BMR.
1 kg of body fat is approximately 7,700 calories. To lose 1 kg per week, create a daily deficit of about 1,100 calories below your TDEE. For most people, a safer rate is 0.5 kg per week (550-calorie deficit), which is more sustainable long-term.