Short answer
Maintenance calories — your TDEE — is the intake at which your weight stays stable. A calculator gives an estimate; the accurate way is to log intake for two to three weeks and see what your weight actually does.
Maintenance is the single most useful number in nutrition, and almost nobody knows theirs. Every deficit and every surplus is defined relative to it, so guessing it means guessing everything downstream.
What it is made of
- BMR — what you burn at complete rest. Usually the largest share, around 60–70%.
- NEAT — everyday movement: walking, fidgeting, standing, gesturing. Varies enormously between people and is the part that quietly drops during a long diet.
- Exercise — usually smaller than people assume.
- Digestion — roughly 10% of intake, higher on protein.
Finding yours properly
- Log everything for two to three weeks without changing your eating. This is the hard part and the whole point — the aim is a true picture, not a good one.
- Weigh yourself daily and take a weekly average. Daily numbers are mostly water and will mislead you.
- Compare week one and week three averages. Flat weight means your average intake over that period is your maintenance.
- If weight moved, adjust by roughly 500 calories per pound per week of change and repeat.
Why it moves
Maintenance is not fixed. It falls as you lose weight — a lighter body costs less to run — and it falls further during a long diet as NEAT drops, which is the adaptation people feel as a stall. It rises with muscle gain and with activity.
Practically: recheck it after every 5–10 kg of change, or any time a deficit that was working stops working.
Eating at maintenance on purpose
Underrated. After a long deficit, a few weeks at maintenance lets hunger hormones and NEAT recover, and makes the next cut more effective. It is not lost time — it is what stops a diet ending in a rebound.
It is also the goal state. Maintenance is where you spend most of your life; a deficit is a temporary tool.
