Calorie/TDEE Calculator
Our Calorie/TDEE Calculator is designed to provide you with a scientific starting point for your fitness journey. TDEE stands for Total Daily Energy Expenditure—the total number of calories your body burns in a 24-hour period based on your age, gender, height, weight, and activity level. Understanding this number is crucial whether you're looking to lose weight, maintain your current physique, or build muscle. Our tool utilize the Mifflin-St Jeor equation, widely regarded as the most accurate model for estimating metabolic rates. We respect your health data; all information you enter stays in your browser and is never stored on our servers.
Maintenance (TDEE)
1971
kcal/dayCalories needed to maintain your current weight based on your activity level.
Basal Metabolic Rate (BMR)
1643
kcal/dayCalories burned at rest.
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What is TDEE and why does it matter?
TDEE stands for Total Daily Energy Expenditure. It represents the total number of calories you burn each day, including your exercise and non-exercise activity. Knowing your TDEE is the 'master key' to weight management: eat fewer calories than your TDEE to lose weight, and more to gain weight (or muscle) consistently.
How accurate are these calorie estimates?
Our calculator uses the Mifflin-St Jeor equation, which is the current gold standard in nutritional science for estimating Basal Metabolic Rate (BMR). While every body is unique, this provides a highly reliable starting point that you can then adjust based on your real-world progress over a 2-4 week period.
Is my health data privacy protected?
Your health journey is personal. T00LZ is designed so that your metrics—age, weight, height—are processed exclusively in your browser's local memory. We do not transmit your health profile to any database, ensuring your privacy is maintained while you plan your fitness goals.