TDEE Calculator – Maintenance Calories for Lifters

What TDEE means

Total daily energy expenditure is the energy your body uses across a day. It includes resting needs, food digestion, exercise, and ordinary movement. Your daily calorie intake relative to that expenditure influences the direction of your body-weight trend over time. The number changes with your routine; it is not a permanent property stored in your body.

This calculator estimates resting expenditure first, then multiplies it by an activity factor. Enter body weight, height, age, and the relevant equation coefficient. The historical model uses male and female coefficients. They describe the equation's original structure and cannot represent every person's physiology. This tool is for adult planning, not for children, pregnancy, clinical nutrition, or a personalized medical diet.

The Mifflin-St Jeor formula

The commonly used rounded formula is ten times weight in kg, plus 6.25 times height in cm, minus five times age in years. Add five for the male coefficient, or subtract 161 for the female coefficient. TDEE is that resting estimate multiplied by the chosen activity factor. Imperial inputs are converted to kg and cm before the calculation.

The original Mifflin-St Jeor research is the basis for the resting estimate; the activity categories are practical multipliers, not a measured metabolic test. A male-coefficient example at 80 kg, 175 cm, and age thirty produces about 1,749 resting calories. With a 1.55 multiplier, the maintenance estimate is about 2,711 calories per day. The rounded display should not make that estimate feel exact.

Choose activity from your whole day

Three gym sessions do not automatically make a mostly seated week very active. Consider walking, commuting, physical work, sport, and training together. Someone lifting twice while working on their feet can expend more energy than someone lifting four times and sitting for the rest of each day. Pick a plausible category, then let observations improve it.

Do not add every calorie reported by a watch on top of an activity multiplier that already includes your workouts. That risks counting the same activity twice. Consistency is more valuable than finding the perfect category label. If your schedule changes substantially, recalculate and reassess rather than carrying an old target into a new routine.

Calibrate maintenance with real observations

Use a consistent intake and measure body weight under similar conditions over several weeks. Daily weight can change because of food volume, hydration, carbohydrate intake, and normal biological variation. Compare weekly averages rather than reacting to a single morning. If the average stays roughly stable, your observed intake is a better maintenance clue than a calculator result alone.

If the trend does not match your goal, make a modest adjustment and observe again. Keep training performance, energy, sleep, and appetite in the decision. The guide to lean bulk calories explains a surplus without pretending that all gained weight is muscle. The guide to cutting without losing muscle explains why an aggressive deficit can make training harder.

Move from calories to meals

Once you have a reasonable calorie starting point, use the macro calculator to divide it into protein, fat, and carbohydrate. The protein calculator offers a simple adult training range. Those are planning aids, not rules that turn ordinary meals into a daily exam.

You do not need to hit the displayed calorie number to the last unit. Food labels, serving estimates, and actual expenditure all contain uncertainty. Aim for a repeatable pattern you can review. If food tracking becomes distressing, or your situation includes a medical condition, get individual support rather than trying to solve the problem with more decimal places.