Enter your details to instantly find your daily maintenance calorie level (TDEE).
How the Maintenance Calories Calculator Works
Enter Age, Weight, Height & Gender
Calculate BMR (Mifflin-St Jeor)
Select Your Activity Level
Multiply BMR × Activity Factor
Get Your Daily Maintenance Calories
What Are Maintenance Calories?
Maintenance calories, also known as your Total Daily Energy Expenditure (TDEE), represent the exact number of calories your body burns in a full day, accounting for your resting metabolism plus all daily activity, exercise, and digestion. Eating at this level keeps your weight stable over time — no gain, no loss. It's the single most important number in nutrition planning, because every fat loss or muscle gain goal is really just a calculated adjustment above or below this baseline.
Our free online maintenance calories calculator gives you this number instantly using validated formulas, removing the guesswork that leads so many people to either undereat (stalling progress and increasing hunger) or overeat (causing unwanted weight gain) simply because they don't know their true daily energy needs.
How Are Maintenance Calories Calculated?
The calculation happens in two steps:
- Calculate BMR (Basal Metabolic Rate) using the Mifflin-St Jeor equation:
Men: BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age + 5
Women: BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age − 161 - Multiply BMR by an activity multiplier that reflects your typical weekly movement and exercise level, producing your TDEE (maintenance calories).
Activity Multiplier Reference Table
| Activity Level | Multiplier | Description |
|---|---|---|
| Sedentary | 1.2 | Desk job, minimal structured exercise |
| Lightly Active | 1.375 | Light exercise 1–3 days per week |
| Moderately Active | 1.55 | Moderate exercise 3–5 days per week |
| Very Active | 1.725 | Hard exercise 6–7 days per week |
| Extremely Active | 1.9 | Physical job combined with daily training |
Why Knowing Your Maintenance Calories Matters
- Sets an accurate baseline: Every fat loss or muscle gain target is simply a percentage adjustment from this number.
- Prevents guesswork: Many people underestimate or overestimate their needs by hundreds of calories without a proper calculation.
- Supports weight maintenance: If your goal is simply to stay at your current weight, this is the number to hit consistently.
- Improves diet adherence: Knowing your real number helps you avoid overly restrictive diets that are hard to sustain.
Adjusting from Maintenance for Your Goal
| Goal | Typical Adjustment |
|---|---|
| Fat Loss | Maintenance − 300 to 500 kcal/day |
| Muscle Gain (Lean Bulk) | Maintenance + 250 to 500 kcal/day |
| Weight Maintenance | Eat at calculated maintenance level |
If your goal is fat loss, our Weight Loss Calculator builds directly on this maintenance number to create a full deficit plan with an estimated timeline. If your goal is building muscle, pair your adjusted surplus with our Muscle Gain Calculator to set realistic expectations for how much lean mass you can add.
Why Your Maintenance Calories Change Over Time
Your TDEE isn't fixed forever — it shifts as your weight, activity level, age, and muscle mass change. As you lose weight, your BMR naturally decreases because a smaller body requires less energy at rest. As you build muscle, your BMR gradually increases since muscle tissue burns more calories than fat tissue even at rest. This is why recalculating your maintenance calories periodically, especially after meaningful weight changes, keeps your nutrition plan accurate.
Common Mistakes When Estimating Maintenance Calories
- Overestimating activity level, which inflates the calculated TDEE and can stall fat loss progress
- Not recalculating after significant weight changes
- Ignoring non-exercise activity (walking, standing, fidgeting), which can meaningfully affect daily energy expenditure
- Relying on a single formula without adjusting based on real-world tracking over several weeks
Frequently Asked Questions
Is TDEE the same as maintenance calories?
Yes, TDEE (Total Daily Energy Expenditure) and maintenance calories refer to the same concept — the number of calories needed to keep your weight stable.
How accurate are maintenance calorie calculators?
Formula-based estimates like Mifflin-St Jeor are generally accurate within about 10% for most people, but individual variation means it's best used as a starting point to adjust based on real-world results.
How often should I recalculate my maintenance calories?
Recalculate every time you gain or lose a meaningful amount of weight (roughly 5 kg or 10 lb), or if your activity level changes significantly.
What if I'm not losing or gaining weight at my calculated calories?
Track your actual intake and weight trend for 2–3 weeks and adjust your calorie target up or down by 100–200 calories based on the real-world result, since individual metabolic variation is normal.