What "Maintenance Calories" Actually Means
Maintenance calories are the number of calories you can eat daily while keeping your weight stable over time — in other words, your TDEE. Eat above it and you gain weight; eat below it and you lose weight. Every weight-loss deficit or muscle-gain surplus is calculated as an adjustment from this one baseline number.
Formula estimate first, real-world data second: our calculator gives you a starting maintenance estimate from your BMR and activity level. But formulas are estimates — the section below shows how to confirm your true number using your own tracked data.
How to Calculate Your Starting Estimate
Why Your Real Number Might Differ From the Formula
| If your weight... | Then your real maintenance is... |
|---|---|
| Stayed flat over 2–3 weeks | Very close to the formula estimate — good, use it as-is |
| Trended up slightly | Somewhat lower than the estimate; adjust down 100–150 kcal |
| Trended down slightly | Somewhat higher than the estimate; adjust up 100–150 kcal |
Maintenance Isn’t Static
Your maintenance calories change whenever your weight, activity level, or age shifts meaningfully. Someone who loses 5 kg, starts a new job with a longer commute, or simply gets a year older all need a recalculated maintenance number — it isn’t a number you set once and use forever.
Don’t confuse maintenance with BMR. Maintenance calories (TDEE) are always higher than BMR, since they include all your daily activity on top of resting energy needs. See BMR vs TDEE for the full breakdown.
Frequently Asked Questions
Get Your Starting Estimate
Calculate your maintenance calories from your BMR and activity level in seconds.
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