Calorie Maintenance (TDEE) what it is and how to calculate yours?

Maintenance calories, also referred to as TDEE or Total Daily Energy Expenditure, represent the daily calorie intake at which your body is in perfect energy balance, meaning you're consuming exactly as much as you burn and your weight stays stable. Eat below this number and you're in a calorie deficit, which leads to weight loss. Eat above it and you're in a surplus, which leads to weight gain. This energy balance is the foundation of everything related to body weight and cannot be bypassed regardless of which diet or eating style you follow. It's also worth knowing that your maintenance level isn't fixed forever since it shifts as your weight, activity, and age change over time.

The most widely used methods are the Harris-Benedict and Mifflin-St Jeor equations, both of which calculate your basal metabolic rate (BMR) based on your bodyweight, height, age, and sex, then multiply it by an activity multiplier to estimate total daily expenditure. Activity multipliers range from sedentary (1.2) up to very active (1.725), and this is the factor most people underestimate when calculating their TDEE. Any reliable online TDEE calculator will give you a reasonable starting estimate, though these are approximations rather than exact values. The most accurate real-world method is to log your food intake consistently for two to three weeks while monitoring your weight, and then use that data to determine where your actual maintenance sits. If your weight stays stable at a given intake level, that's your maintenance.

The most commonly recommended calorie deficit for sustainable fat loss is 300 to 500 calories per day below your maintenance level, which typically results in around 0.3 to 0.5 kilograms of weight loss per week. This pace is fast enough to see consistent progress but slow enough to preserve most of your muscle mass and keep the diet manageable over the long term. Larger deficits of 700 to 1000 calories per day will produce faster weight loss on the scale, but they come with a higher risk of muscle loss, significantly increased hunger, and are much harder to sustain for the months required to reach a meaningful goal. For most people a moderate deficit works best because it doesn't require a dramatic overhaul of existing eating habits. Tracking your intake accurately, even just for the first few weeks, makes a big difference in knowing whether you're actually hitting your target deficit or just estimating.

As your bodyweight decreases, your body requires less energy to function, which means your maintenance calorie level gradually drops alongside your weight. This means that the same calorie intake that put you in a deficit at the start of your diet can eventually become your new maintenance level, causing weight loss to slow down or stall entirely. This is one of the most common reasons people lose weight steadily at first and then plateau after several weeks without changing anything they're doing. It's not that your metabolism is broken or has adapted in some extreme way, it's simply that a lighter body burns fewer calories at rest and during activity. The fix is straightforward: recalculate your maintenance every four to six kilograms of weight lost and adjust your calorie target accordingly to keep the deficit intact.

Building muscle requires a calorie surplus, meaning you need to eat somewhat above your maintenance level to give your body the energy it needs to synthesize new muscle tissue. The recommended surplus for lean muscle building is generally around 200 to 300 calories per day above maintenance, which is enough to support growth without accumulating excessive body fat alongside it. A much larger surplus, often called a dirty bulk, does produce faster weight gain but a significant portion of that gain tends to be fat rather than muscle, which most people then have to spend time dieting off afterward. Protein intake remains critical here regardless of the surplus size, with at least 1.6 to 2 grams per kilogram of bodyweight per day being the standard recommendation for optimizing muscle growth. Knowing your maintenance number accurately is just as important during a building phase as it is during a cut, because without that baseline you're essentially guessing at whether you're eating enough to actually grow.