Find your maintenance calories without guessing

Your maintenance calories are the intake that holds your bodyweight steady, and the dependable way to find them is to estimate first and measure second. A formula gives an estimated starting number. Two to three weeks of consistent logging against your weekly average bodyweight gives the real one. This guide walks through both steps, what scale noise to ignore, and how a man who lifts uses the number for a cut or a bulk.

Start with a formula, then verify it

Maintenance is the intake at which your weight neither rises nor falls. Your total daily energy expenditure, or TDEE, is the estimated number of calories you need to maintain your current weight.

Those calculators all do one job: they estimate. An estimated maintenance comes from a formula, which is BMR times an activity multiplier. An observed maintenance comes from data: two to three weeks of consistent logging with a stable weekly average bodyweight. The second is the one worth having, because the first can be off in ways you cannot see from the formula alone.

So the process has two steps. Estimate with a formula to choose a sensible first week of food. Then eat at that number, watch what your weight does, and correct. The rest of this guide is those two steps in detail.

Step 1: estimate it with a formula

The formula most calculators use for resting energy is the Mifflin-St Jeor equation. For men it is (10 × weight in kg) + (6.25 × height in cm) - (5 × age in years) + 5. That gives your BMR. Then multiply by an activity factor: 1.2 for sedentary, 1.375 for light exercise one to three days a week, 1.55 for moderate exercise three to five days, 1.725 for hard exercise six to seven days, and 1.9 for very hard exercise with a physical job or two sessions a day.

Here is the arithmetic for an example man, 80 kg, 180 cm and 30 years old who lifts four days a week. The BMR is 800 + 1,125 - 150 + 5 = 1,780. At the moderately active factor of 1.55, the estimate is about 2,759 calories. Treat that as a week-one target, not a result.

A lifter who trains four days a week sits on the border between two factors, which shows the first weakness of the method: you have to guess your activity level, and a small change in the multiplier moves the answer by hundreds of calories.

If you want something quicker, one coach’s rule of thumb, assuming about an hour of exercise plus normal daily activity, is that 14 to 16 calories per pound of bodyweight is usually a decent enough starting point for estimating maintenance. Both methods give a number to begin with, nothing more. As that same coach puts it, no matter what equation you use to estimate maintenance calories, that is all it is: an estimation.

Step 2: measure it from your own log

The check is simple. Eat consistently at your estimated maintenance, weigh daily, and average each week. If the average holds, that intake is maintenance. If it drifts, adjust and hold again.

Plan on two to three weeks of consistent logging before you trust the number. Consistency matters more than precision here: a log that is roughly right every day is worth more than a perfect log for three days and nothing for four. If weighing every portion is the obstacle, track calories without weighing food covers the workable shortcuts.

Read the result like this:

• Weekly average weight flat: the number you ate is your maintenance.
• Weekly average rising: maintenance is lower than your estimate. Cut a few hundred calories and hold again.
• Weekly average falling: maintenance is higher. Add a few hundred and hold again.

The reason to bother comes from the same coach: an estimate has to be modified based on real-world body composition changes, because what an equation says should be happening counts for little if your body is doing something else. The formula started the process, and the data finishes it.

You need two series for this, food eaten and bodyweight. In GreekBody, which is an app and not a training program, the Fuel tab holds a calorie dial with protein and a 7-day strip, and the Body tab shows weight and waist trends. Those are the two records step 2 runs on. GreekBody describes itself as an AI personal trainer, not another calorie tracker, so use the app to hold the data, then read the pattern the way this section describes.

What noise to ignore

A scale reading from one morning is a poor guide. Water retention can mask true fat loss, and fat loss is not always linear. That is why the method uses a weekly average and not a single weigh-in: a heavy Monday after a salty Sunday is not a verdict on your intake.

Ignore these:

• One high or low weigh-in, in either direction.
• A weekly average that moved a little and then moved back.
• The idea that the answer is one exact number. Bodyweight is stable across a band of a few hundred calories, and treating maintenance as a single figure makes you anxious about a margin that does not matter.

Act on a weekly average that keeps moving in one direction across two weeks. That is data, and the other things are noise.

How to use the number when you lift

Once you have a maintenance range, every goal is set relative to it. A cut eats below it and a bulk eats above it. A moderate deficit might be 20 percent below maintenance. For the cut itself, losing belly fat and keeping muscle covers the setup, and the protein guide for fat loss covers the protein.

Then recheck, because the number moves. Bodyweight change is the obvious driver, but activity, training volume, season, job and stress all move it. After a large weight loss, maintenance is lower, and the fix is to measure it again over two to three weeks of stable intake, and if you are coming off a cut, you can reverse diet after a cut without regaining from there. Skip that step and a cut that worked early can quietly turn into a stall, and you can read how to break a weight loss plateau while lifting for what to change when it does.

If you are a thin man with a soft middle, the target may not be a cut at all. GreekBody offers that man a Recomp goal, which builds and leans at once, instead of a cut.

Conclusion

Use a formula to pick your first week, then let your own log correct it. Eat at the estimate for two to three weeks, weigh daily, average each week, and move the intake only when the weekly average keeps drifting. Then set your cut or bulk against that measured number, and recheck it after any large change in weight.