A Maintenance Calorie Calculator estimates how many calories you need each day to maintain your current weight. It uses your body measurements and activity level to calculate your maintenance calories (often called TDEE) so you can plan meals with confidence.
Use the calculator below, then read the guide to understand what the numbers mean, how accurate they are, and how to adjust intake if your weight changes.
What “maintenance calories” actually means
Maintenance calories are the daily energy intake that keeps your body weight stable over time. If you consistently eat around this number, your body balances calories from food with calories you burn through basic body functions and daily movement.
Most calculators estimate maintenance calories using two steps: (1) estimate your resting metabolic rate (BMR) and (2) multiply it by an activity factor to estimate total daily energy expenditure (TDEE).
The formulas behind the Maintenance Calorie Calculator
BMR (Basal Metabolic Rate)
This calculator uses the Mifflin–St Jeor equation, a common method for estimating how many calories you burn at rest. BMR depends on age, sex, height, and weight.
- Men: BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age + 5
- Women: BMR = 10 × weight(kg) + 6.25 × height(cm) − 5 × age − 161
TDEE (Total Daily Energy Expenditure)
To move from BMR to maintenance calories, the calculator multiplies BMR by an activity multiplier. This accounts for daily movement, work intensity, and exercise habits.
| Activity level | Typical description | Multiplier |
|---|---|---|
| Sedentary | Mostly sitting, little exercise | 1.2 |
| Lightly active | Light exercise or walking most days | 1.375 |
| Moderately active | Exercise 3–5 days/week | 1.55 |
| Very active | Hard training or physical job | 1.725 |
| Extra active | Very intense training most days | 1.9 |
Maintenance calories (TDEE) = BMR × activity multiplier.
How to use the Maintenance Calorie Calculator results
Once you have your maintenance calories, plan your intake to match your goal. For weight maintenance, aim to eat close to the number you see. For weight change, use a consistent deficit or surplus.
- Maintenance: Eat around your TDEE.
- Lose fat: Start with a modest deficit (often 10–20%).
- Gain weight: Start with a modest surplus (often 5–15%).
To reduce guesswork, track your weight and adjust after 2–3 weeks. Your body responds to calorie intake, but water shifts and normal daily variation can mask true trends.
What inputs matter most (and why)
Body weight and height
Weight and height strongly influence BMR because they reflect body size. If your measurements are off, your maintenance estimate will be off too. Use your most recent, consistent numbers.
Age and sex
Age affects BMR because metabolic rate generally declines over time. Sex affects the equation because average body composition differs between men and women.
Activity level
Activity is often the biggest source of error. Two people with the same BMR can have very different TDEE depending on daily steps, job demands, and training intensity. Pick the closest description you can honestly match.
Practical example #1: Maintaining weight with busy weekdays
Imagine you’re 34 years old, female, 165 cm tall, and weigh 68 kg. If you choose Lightly active because you walk and do light workouts, the calculator estimates your maintenance calories. If your weight stays stable for 2–3 weeks, your number is working.
If you slowly gain weight, lower calories by about 5–10%. If you slowly lose weight, increase by 5–10%. Small adjustments beat constant changes.
Practical example #2: Using maintenance calories to cut fat
Suppose the calculator shows maintenance calories of 2,300 per day. To lose fat without crashing your energy, you might start at 1,900–2,070 calories depending on how aggressive you want to be. Then monitor your weekly average weight and hunger levels.
If your average weight doesn’t change after 2–3 weeks, adjust by another 100–200 calories. Consistency matters more than exact day-to-day meals.
Accuracy: what to expect from a Maintenance Calorie Calculator
These estimates are useful, but they are not perfect. Real-world TDEE varies due to factors like muscle mass, sleep quality, stress, and how much you move outside planned workouts (steps, chores, posture).
Think of the result as a strong starting point. The fastest way to “calibrate” is to track intake and weight trends, then refine your target.
How to calibrate your calories in the real world
- Pick a starting target using the calculator.
- Track for 14–21 days (weigh at the same time of day, ideally after waking and using the bathroom).
- Use weekly averages to smooth out water weight swings.
- Adjust by 5–10% if your trend is moving.
This method turns a math estimate into a personal number that matches your routine.
Frequently Asked Questions
How accurate is a Maintenance Calorie Calculator?
It’s usually accurate enough for a starting point because it estimates BMR and multiplies by activity. Real TDEE varies with muscle mass, steps, sleep, and stress. Use the result for 2–3 weeks, compare your weight trend, then adjust by 5–10% for better accuracy.
Should I eat my exact maintenance calories every day?
You don’t need perfect daily accuracy. If your weekly average matches your maintenance calories, your weight will likely stay stable. Small daily swings are normal due to water, salt, and digestion. Focus on consistency and adjust based on weekly trends, not single weigh-ins.
What if I’m between two activity levels?
Choose the lower multiplier if you’re unsure, then calibrate. Overestimating activity can lead to gradual weight gain. If you’re more active than you selected, your weekly weight trend will reveal it. Adjust after 2–3 weeks by 5–10% to match your true TDEE.
Can maintenance calories change over time?
Yes. Weight, body composition, training volume, and even seasonal routines can change your TDEE. If your weight changes or your workouts become more or less intense, update your estimate. Recalculate every few weeks during training changes or after significant weight loss or gain.
Is maintenance calories the same as my “calories burned”?
Maintenance calories are your total daily energy expenditure (TDEE) in calorie terms. Your body burns energy continuously, but TDEE is an estimate of that total. Food intake matching TDEE is what keeps weight stable, even though the exact daily burn can fluctuate.
Quick checklist before you start
- Use current weight and measured height.
- Select the activity level that matches your typical week.
- After 2–3 weeks, adjust based on your weekly weight average.
- Prioritize consistency over perfection.
With your Maintenance Calorie Calculator result and a simple calibration plan, you can set a realistic daily target that supports your goals.