About the TDEE Calculator

Total Daily Energy Expenditure (TDEE) is the total number of calories your body burns in a day, accounting for all physical activity. It is calculated by first determining your Basal Metabolic Rate (BMR) — the calories your body needs at complete rest — and then multiplying it by an activity factor that reflects your daily physical activity level.

This calculator uses the Mifflin-St Jeor equation, which is considered one of the most accurate predictive equations for estimating BMR. The formula accounts for your gender, weight, height, and age to produce a personalized estimate. For men, the equation is BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age) + 5. For women, the constant changes to -161.

Knowing your TDEE is essential for weight management. To lose weight, you need to consume fewer calories than your TDEE (caloric deficit). To gain weight, you consume more (caloric surplus). A deficit of 500 calories per day roughly corresponds to losing about 1 pound (0.45 kg) per week, while a 250-calorie deficit leads to a more gradual, sustainable loss.

Both metric and imperial units are supported. Imperial values are automatically converted to metric for the calculation. Always consult a healthcare professional or registered dietitian before making significant changes to your diet.