If you are trying to lose fat, build muscle, or simply stop guessing how much to eat, your first target is your maintanance calories (also spelled maintenance calories). This number represents how many calories you burn in a typical day. Use the calculator below to get a practical estimate, then fine-tune it with your real-world progress.
Daily Maintanance Calorie Calculator
Enter your details to estimate your Total Daily Energy Expenditure (TDEE).
What are maintanance calories?
Your maintanance calories are the number of calories you need to eat each day to keep your body weight stable over time. If you eat close to this amount consistently, your average weekly weight should stay roughly the same (allowing for normal water fluctuations).
Think of it as your nutritional “neutral.” From this baseline, you can create a small calorie deficit for fat loss or a small surplus for muscle gain.
How this calculator estimates your calories
1) Basal Metabolic Rate (BMR)
BMR is the energy your body uses at rest to keep you alive (breathing, circulation, cellular repair, etc.). This tool uses the Mifflin-St Jeor equation:
- Men: BMR = (10 × kg) + (6.25 × cm) − (5 × age) + 5
- Women: BMR = (10 × kg) + (6.25 × cm) − (5 × age) − 161
2) Activity multiplier
Your BMR is then multiplied by an activity factor to estimate TDEE (Total Daily Energy Expenditure):
- Sedentary: 1.2
- Lightly active: 1.375
- Moderately active: 1.55
- Very active: 1.725
- Extra active: 1.9
TDEE is your estimated maintanance calorie target.
How to use your result
If your goal is fat loss
Start with a moderate deficit of 300–500 calories below maintanance. This usually supports steady fat loss while preserving performance and muscle.
If your goal is muscle gain
Start with a smaller surplus of 150–300 calories above maintanance. This helps you gain lean tissue without unnecessary fat gain.
If your goal is weight stability
Aim for your estimated maintanance, monitor your 7-day average body weight, and adjust by 100–200 calories if your trend is drifting up or down for 2–3 weeks.
Practical tracking tips
- Weigh yourself daily at the same time and use weekly averages.
- Track food portions consistently (especially oils, snacks, and drinks).
- Keep protein intake high and stable to support body composition.
- Hold activity levels relatively steady while testing calories.
- Adjust slowly—small changes are easier to sustain and evaluate.
Common mistakes
- Choosing the wrong activity level: Most people overestimate daily movement.
- Ignoring weekend intake: Extra social meals can erase weekday deficits.
- Expecting perfection: Calculators provide a starting estimate, not a final truth.
- Changing too many variables at once: Keep training and steps consistent before adjusting calories.
FAQ
Why am I gaining weight at “maintenance”?
It may be water retention, increased sodium, menstrual cycle shifts, more carbs (glycogen + water), or simply an overestimated activity multiplier. Watch trends for at least 2 weeks before making changes.
How accurate is this calculator?
For many people, it is accurate enough to start. Real-life calibration is still needed. Your true maintanance can be 5–15% above or below the estimate.
How often should I recalculate?
Recalculate after a significant body weight change (about 5–10 lb / 2–5 kg), a major training change, or if your routine becomes much more or less active.
Bottom line
The best maintanance calorie calculator gives you a useful starting point, but your weekly data is what makes it precise. Use the estimate, track honestly, and fine-tune in small steps. Consistency beats perfection every time.