How to Calculate Maintenance Calories with TDEE

2026-05-29

Managing your weight effectively begins with understanding your body's energy needs. You cannot manage what you do not measure. Whether your goal is to lose fat, gain muscle, or maintain your current physique, knowing your Total Daily Energy Expenditure (TDEE) is the foundational step. This guide will walk you through how to calculate your maintenance calories using the most accurate scientific methods available.

What is TDEE and Maintenance Calories?

Total Daily Energy Expenditure (TDEE) is the total amount of energy (calories) your body burns in a 24-hour period. It accounts for your Basal Metabolic Rate (BMR) plus the calories you burn through physical activity and the Thermic Effect of Food (TEF).

Maintenance calories are the specific number of calories you need to consume each day to keep your weight exactly where it is. If you eat more than your maintenance calories, you will gain weight. If you eat less, you will lose weight. Calculating your maintenance calories allows you to set a precise target for your dietary goals.

The Gold Standard: The Mifflin-St Jeor Equation

While there are several formulas to estimate BMR, the Mifflin-St Jeor equation is widely considered the most accurate for the general population. It balances weight, height, age, and biological sex to estimate resting energy expenditure.

Step 1: Calculate Your BMR

Your BMR is the number of calories your body burns at complete rest to keep your heart beating, lungs breathing, and organs functioning. Use the following formulas:

For Men:

[ BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age in years) + 5 ]

For Women:

[ BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age in years) - 161 ]

Example Calculation:

Weight: 70 kg
Height: 175 cm
Age: 30 years
Sex: Male

[ BMR = (10 × 70) + (6.25 × 175) - (5 × 30) + 5 ] [ BMR = 700 + 1093.75 - 150 + 5 ] [ BMR = 1648.75 ]

This man burns approximately 1,649 calories per day just by existing.

Step 2: Apply the Activity Multiplier

Once you have your BMR, you must account for your daily activity level. This is where TDEE comes in. You multiply your BMR by a specific factor based on how active you are.

Activity Level	Description	Multiplier
Sedentary	Little to no exercise, desk job	1.2
Lightly Active	Light exercise 1-3 days/week	1.375
Moderately Active	Moderate exercise 3-5 days/week	1.55
Very Active	Hard exercise 6-7 days/week	1.725
Super Active	Physical job or training twice daily	1.9

Continuing the Example:

If the male from Step 1 works a desk job but goes to the gym three times a week (Moderately Active), we use a multiplier of 1.55.

[ TDEE = BMR × Multiplier ] [ TDEE = 1648.75 × 1.55 ] [ TDEE ≈ 2555 ]

His Total Daily Energy Expenditure is approximately 2,555 calories. This is his maintenance level. To maintain his current weight, he should aim to eat around 2,500–2,600 calories per day.

How to Use Your Maintenance Calories

Now that you have your number, how do you use it?

For Weight Loss

To lose weight, you must create a calorie deficit. A safe and sustainable rate of weight loss is generally considered to be 0.5 to 1 kg (1–2 lbs) per week. This typically requires a deficit of 500 calories per day.

Target Calories: Maintenance Calories – 500

For Weight Gain

To gain weight, specifically muscle mass, you need a calorie surplus. A surplus of 200–300 calories per day is often recommended to support muscle growth without excessive fat gain.

Target Calories: Maintenance Calories + 300

Fine-Tuning Your Results

Calculators provide estimates, not medical diagnoses. Your actual metabolism can vary based on genetics, stress levels, sleep quality, and hormonal health. If you find that your weight is not changing after a few weeks at your calculated maintenance calories, consider adjusting your intake by 100–200 calories.

Factors Influencing TDEE

Non-Exercise Activity Thermogenesis (NEAT): This includes fidgeting, walking, and posture. High NEAT can significantly impact TDEE.
Thermic Effect of Food (TEF): The energy used to digest food. Protein has the highest TEF, followed by carbs and fats.
Muscle Mass: Muscle tissue burns more calories at rest than fat tissue. Increasing muscle mass via resistance training can raise your BMR over time.

Disclaimer

The information provided in this article is for educational purposes only. Calculators are estimates and should not replace professional medical advice. Always consult with a healthcare provider or a registered dietitian before making drastic changes to your diet or exercise routine.