Before you cut calories, add calories, or do anything else with your diet, there’s one number you need to know: your maintenance calories. It’s the foundation every other calculation rests on — and it’s the step most beginners skip entirely.
Here’s what maintenance calories are, why they matter, and how to actually find yours.
What Are Maintenance Calories?
Maintenance calories — sometimes called your maintenance level or TDEE (Total Daily Energy Expenditure) — is the number of calories your body needs each day to keep your current weight exactly where it is. Not gain, not lose. Stay the same.
It’s not a fixed number from a chart. It’s personal, and it changes based on your body size, age, sex, and how active you are.
When you eat above your maintenance calories, you’re in a calorie surplus — the condition for weight gain and muscle building. When you eat below it, you’re in a calorie deficit — the condition for fat loss. Neither strategy works well unless you know where that baseline is.
Why Maintenance Calories Matter More Than You Think
Most people jump straight to “how many calories should I eat to lose weight?” without first establishing how many calories they’re burning. That shortcut leads to problems.
If you underestimate your maintenance level, you might set a calorie goal that’s actually already a deficit without realizing it — making your cut too aggressive. If you overestimate it, you might eat what you think is a deficit while barely dipping below maintenance at all.
Getting this number right is what makes calorie tracking actually work.
How to Calculate Your Maintenance Calories
There are two main approaches: using a formula, or measuring it yourself.
The Formula Method (TDEE)
The most common method starts with your Basal Metabolic Rate (BMR) — the calories your body burns at complete rest — and then multiplies it by an activity factor.
A widely used formula is the Mifflin-St Jeor equation:
For men: BMR = (10 × weight in kg) + (6.25 × height in cm) − (5 × age) + 5
For women: BMR = (10 × weight in kg) + (6.25 × height in cm) − (5 × age) − 161
Once you have your BMR, multiply it by your activity level:
| Activity Level | Multiplier |
|---|---|
| Sedentary (desk job, little exercise) | × 1.2 |
| Lightly active (1–3 days/week exercise) | × 1.375 |
| Moderately active (3–5 days/week) | × 1.55 |
| Very active (6–7 days/week, hard training) | × 1.725 |
| Extremely active (physical job + daily training) | × 1.9 |
The result is your estimated maintenance calories. It’s a starting point — not gospel.
The Real-World Method (More Accurate)
Formulas make assumptions about your metabolism that may not hold for you personally. A more reliable approach: track what you actually eat for 2–3 weeks without intentionally changing your habits, and track your weight each morning.
If your weight stays flat across that period, your average daily intake is your maintenance calories. If you gained, your true maintenance is slightly lower than what you ate. If you lost, it’s slightly higher.
This method takes longer but produces a number grounded in your actual body, not a population average.
Common Mistakes When Setting Your Maintenance
Underestimating activity. Most people choose “sedentary” when they should choose “lightly active.” If you walk regularly, do housework, or stand for part of the day, you’re burning more than a desk-bound sedentary person.
Using your goal weight instead of current weight. Maintenance calories are based on current body composition, not where you want to be. Recalculate whenever your weight changes significantly (every 5–10 lbs is a common rule of thumb).
Ignoring that it changes. Research indicates that metabolism adapts over time. After extended dieting, maintenance calories can drift downward — sometimes called “metabolic adaptation.” This is one reason weight loss plateaus happen even when nothing in your diet seems to have changed.
How to Use Your Maintenance Calories
Once you know your number, applying it is straightforward:
For fat loss: Aim for a deficit of 300–500 calories per day below maintenance. Evidence points to this range as effective for steady fat loss while preserving muscle. More aggressive cuts tend to produce muscle loss and faster metabolic adaptation.
For muscle gain: Aim for a modest surplus of 150–300 calories above maintenance. A small surplus limits unnecessary fat gain while giving your body enough fuel to build.
For maintenance (body recomposition): Eating at maintenance while increasing training volume can slowly shift your body composition — losing fat and gaining muscle simultaneously — though this process is slower than dedicated cut or bulk phases.
For diet breaks: After a long deficit, returning to maintenance for 1–2 weeks can help reset hunger hormones and support compliance. Studies suggest periodic maintenance phases may improve long-term diet adherence.
Recalculate as You Go
Your maintenance calories today won’t be the same in three months. As your body weight changes, so does the energy required to sustain it. A lighter body burns fewer calories at rest. Build in a recalculation every time your weight shifts by 10 lbs or more — or if you notice your progress stalling despite staying consistent with your numbers.
Treat your maintenance level as a living estimate, not a permanent setting.
Start Tracking with AIDente
AIDente makes it easy to log your meals, track your daily intake against your maintenance calories, and spot patterns that push you off course. Whether you’re working toward a deficit, a surplus, or just trying to find your true baseline, AIDente gives you the data to do it accurately — without the guesswork.