Maintenance Calorie Calculator

Maintenance calories are the daily calories your body needs to keep your weight about the same. The calculator above already gave you your number, so use it as a starting point for planning meals, checking your current intake, or setting a gradual calorie deficit.

Your result is an estimate. Track your body weight and how you feel while eating near that number, then compare the trend after a few weeks. No formula captures every part of your individual biology.

Your number is a starting point

The number above is arithmetic. Holding your weight near that number is biology. Hunger is a regulated signal, not a willpower problem, which is why maintenance is easier to calculate than to keep.

Your appetite, routine, activity, and food choices can all make a target feel easier or harder to maintain. If your actual weight trend does not match the estimate, that does not mean you failed. It means the estimate needs to be tested against your real experience. Use the number as a reference, then learn more in our appetite section.

How this maintenance calorie calculator works

The calculator first estimates your resting metabolic rate with the Mifflin-St Jeor equation. Resting metabolic rate is the energy your body uses at rest. Mifflin-St Jeor, published in 1990, is recommended by the Academy of Nutrition and Dietetics for estimating resting energy expenditure in adults because it was validated on a more representative modern population than the older Harris-Benedict equation, which tends to overestimate.

Next, the calculator multiplies that estimate by your activity level. It uses 1.2 for sedentary, 1.375 for lightly active, 1.55 for moderately active, 1.725 for very active, and 1.9 for extremely active. The result is your estimated maintenance calorie level.

That is the basic answer to how to calculate maintenance calories: estimate resting needs, then account for activity. Treat your result as a starting point to test against your scale trend, not as a direct measurement of your metabolism.

Why the calculator uses pounds and feet

This calculator uses pounds, feet, and inches because those are familiar US customary units for many US readers. You can enter your information directly and receive an answer without converting your weight to kilograms or your height to centimeters first.

A per-kilogram guideline makes you do extra arithmetic before you can find maintenance calories. That extra step also creates another chance to enter or round a number incorrectly. Direct inputs make the result easier to use.

Search “how many calories should I eat” and you get a tidy answer almost immediately. Two thousand a day. Maybe 2,500 if you are a man. The Nutrition Facts label on every package in your kitchen is built on a 2,000 calorie day (about 8,400 kJ), which makes the number feel official in a way it was never meant to.

It is a reference value. It was chosen so that the “% Daily Value” column would have something to divide by. Nobody measured you.

What you actually need depends on how big you are, how old you are, how much muscle you carry, and what your body does between waking up and going to bed. The gap between two real people can be enormous. Here are eight of them.

Where the energy goes

Total daily energy expenditure comes from three sources (Hall et al., 2012):

1. Basal metabolic rate (BMR): the cost of staying alive. Breathing, circulation, brain activity, keeping your temperature where it should be.
2. Digestion: the energy spent processing what you ate.
3. Physical activity: everything from a deliberate workout to walking across a parking lot.

BMR alone is usually 60 to 70 percent of the total. That surprises people, and it explains a common frustration: someone eats reasonably well, works out three times a week, and still gains, because they overestimated how much those workouts were adding and underestimated everything else.

The estimates below are approximations. Real measurement requires a lab. They are here to show the spread.

The office worker

Sarah, 38, marketing manager. Eight hours at a desk, walks the dog after dinner, gets to a workout class twice a week when the calendar allows.

Weight: about 155 lb
Estimated BMR: about 1,500 calories (6,300 kJ)
Total daily burn: about 1,900 to 2,150 calories (8,000 to 9,000 kJ)

Sarah’s day is the modern default. Sitting, screens, snacks between meetings. Her step count rarely clears 5,000. The two workouts matter for her health, but they contribute a small slice of her weekly energy output compared to her baseline metabolism.

If she wanted to lose weight slowly, she would be looking at a deficit of around 500 calories a day. In food terms that is a pastry and a sweetened latte. It is not a lot to give up, and it is also not nothing when you have to do it on a Tuesday you did not enjoy.

The carpenter

Marcus, 42, framing carpenter. On site at 7am, on his feet all day, hauling lumber and climbing ladders.

Weight: about 200 lb
Estimated BMR: about 1,850 calories (7,750 kJ)
Total daily burn: about 3,100 to 3,600 calories (13,000 to 15,000 kJ)

Marcus does not need a gym membership. His job is the gym. Constant movement, real load-bearing work, and often heat all push his output up dramatically.

When he decides to “eat healthy” by adopting the 2,000 calorie plan his coworker’s wife is on, he is running a 1,000 calorie deficit without realizing it, and he falls apart by 1pm. Then he eats everything in the truck. This is the standard failure mode of generic diet advice: it ignores the work the body is actually doing.

The stay-at-home parent

Jess, 35, two kids under ten. No structured exercise. Also almost never sitting down.

Weight: about 150 lb
Estimated BMR: about 1,450 calories (6,100 kJ)
Total daily burn: about 2,150 to 2,500 calories (9,000 to 10,500 kJ)

Jess would tell you she does not exercise, and she is right. She is also on her feet from 6am to 9pm carrying laundry, groceries, and occasionally a child. All that unglamorous low-level movement has a name in the research literature, non-exercise activity thermogenesis, and it can account for a surprisingly large share of daily energy use (Levine, 2002).

Her needs are higher than most desk workers’ despite the fact that she has never set foot in a gym.

The gym regular

Alex, 30, software engineer. Trains five days a week, sits the rest of the time.

Weight: about 175 lb
Estimated BMR: about 1,675 calories (7,000 kJ)
Training: 45 minutes of lifting plus a 30 minute walk most days
Total daily burn: about 2,600 to 2,850 calories (11,000 to 12,000 kJ)

His training adds roughly 350 to 500 calories on a training day. Because he carries more muscle than average, his resting burn is a little higher too, though the effect is smaller than fitness marketing implies.

The trouble starts when Alex reads that 2,000 calories is normal and eats that. He is now several hundred calories short every day, and he shows up on forums describing himself as tired, starving, and stuck. He is under-fueled, and the fix is to eat more, which is advice almost nobody wants to hear.

The college student

Liam, 20, sophomore. Online classes, long gaming sessions, frequent trips to the kitchen.

Weight: about 165 lb
Estimated BMR: about 1,600 calories (6,700 kJ)
Total daily burn: about 1,900 calories (8,000 kJ)

Liam’s brain is working hard. Unfortunately, thinking is metabolically cheap. Intense mental effort adds very little on top of what the brain already costs, which is a disappointment to everyone who has ever finished finals week feeling like they ran a marathon.

He could maintain his weight on 1,900 calories. He is eating closer to 2,900 once you count energy drinks, late-night delivery, and the snacks that live next to his keyboard. He is gaining slowly, and because it is slow, he has not noticed.

The endurance athlete

Kat, 29, training for a triathlon. Two hours a day across swimming, cycling, and running.

Weight: about 130 lb
Estimated BMR: about 1,300 calories (5,500 kJ)
Total daily burn: about 3,100 to 3,600 calories (13,000 to 15,000 kJ)

Kat is the smallest person on this page and one of the two hungriest. Her training more than doubles her baseline. On a long ride she might clear 4,300 calories (18,000 kJ) for the day, which is more than twice what the label on her cereal box assumes.

This is why endurance athletes eat constantly and why their eating habits are a terrible template for anyone who is not doing what they are doing.

The retiree

Bev, 65, retired teacher. Morning walks, gardening on weekends, cooks most nights.

Weight: about 145 lb
Estimated BMR: about 1,200 calories (5,000 kJ)
Total daily burn: about 1,650 to 1,800 calories (7,000 to 7,500 kJ)

Energy needs decline with age, driven largely by the gradual loss of muscle rather than by anything mysterious happening to the metabolism itself (St-Onge & Gallagher, 2010). Bev needs less than she did at 35. Her appetite and her habits did not get the memo.

A surplus of 100 calories a day is invisible on any given evening and adds up to real weight gain across a decade. Resistance training helps here more than food restriction does, because holding onto muscle protects the baseline.

The teenager

Noah, 16, plays soccer four days a week.

Weight: about 150 lb
Estimated BMR: about 1,500 calories (6,300 kJ)
Total daily burn: about 2,600 to 3,100 calories (11,000 to 13,000 kJ)

Teenagers are expensive to run. Growth, hormonal change, and constant motion push their requirements well above adult levels, and restricting a growing adolescent’s intake carries real risk (Torun, 2005).

Counting calories is the wrong tool at this age. Enough real food to match his activity, and permission to eat when he is hungry, will serve him better. We go into this further on kJs and kids. If there is a genuine concern about a teenager’s weight, that is a conversation for a pediatrician, not a website.

So why does the average number exist

Regulators needed one figure to anchor the label. The FDA settled on 2,000 calories, which is roughly the midpoint of what adults need and precisely correct for almost nobody (FDA). Australia does the same thing with 8,700 kJ, which is about 2,080 calories.

The number is fine for what it was built to do. Applied to an individual, it can be off by a thousand calories in either direction. Marcus would starve on it. Bev would gain on it.

What actually sets your number

Five factors do most of the work (Hall et al., 2012):

1. Body size. Bigger bodies cost more to run. This is the single biggest factor and the one people forget.
2. Muscle mass. Lean tissue is more metabolically active than fat, though the difference per pound is modest.
3. Age. Needs decline gradually, mostly through muscle loss.
4. Sex. Men tend to carry more lean mass at the same weight.
5. Activity. The most variable input, and the one you have any say over.

The NIH Body Weight Planner will give you an estimate from your own height, weight, age, and activity level. Treat what it produces as a starting hypothesis. Then check it against reality.

Finding your real baseline

If you want to know what you actually need, the only reliable method is to observe yourself.

1. Log what you eat for a week or two. Honestly, which is harder than it sounds, and imperfectly, which is fine.
2. Weigh yourself under the same conditions across the same period.
3. Stable weight means you found maintenance.
4. Trending up means surplus. Trending down means deficit. Adjust by a couple hundred calories and watch again.

Your own data beats any equation, because the equation is a population average and you are one person. Ignore daily fluctuations, which are mostly water and mean nothing.

The number here is a target, not a promise. It tells you what to aim at. It says nothing about how hard that aim is to hold.

GLP-1 medications sit on that second question. They will not raise the number you just worked out, and they will not do the counting for you. What they change is appetite, which is often the reason a correct target still gets missed. Our page on why appetite moves covers what else pushes it up and down.

The part the numbers miss

People do not overeat because they cannot do arithmetic. They overeat because food is also comfort, celebration, distraction, and the thing you do at 10pm when the day was bad.

Knowing your energy needs gives you a structure to work inside. Understanding why you reach for food when you are not hungry is what lets you stay inside it. Most programs sell the first and quietly skip the second.

The bigger picture

The average person does not exist. On this page alone, one person maintains on 1,650 calories and another burns more than twice that before dinner. Both are ordinary, healthy adults.

Matching a chart was never the point. What helps is knowing roughly what your own body uses, so you can stop guessing and stop assuming that a number printed on a cereal box has anything to do with you.

If you want to go further, kJs and you works through how to apply this to your own week, and typical foods shows where the energy in a normal diet actually sits.

References

• Hall, K. D., Heymsfield, S. B., Kemnitz, J. W., Klein, S., Schoeller, D. A., & Speakman, J. R. (2012). Energy balance and its components: implications for body weight regulation. The American Journal of Clinical Nutrition, 95(4), 989-994. PubMed
• Levine, J. A. (2002). Non-exercise activity thermogenesis (NEAT). Best Practice & Research Clinical Endocrinology & Metabolism, 16(4), 679-702. PubMed
• St-Onge, M. P., & Gallagher, D. (2010). Body composition changes with aging: the cause or the result of alterations in metabolic rate and macronutrient oxidation? Nutrition, 26(2), 152-155. PubMed
• Torun, B. (2005). Energy requirements of children and adolescents. Public Health Nutrition, 8(7A), 962-969. PubMed
• US Food and Drug Administration. The Nutrition Facts label. fda.gov

Frequently asked questions

What is my maintenance calories?

Your maintenance calories are the daily calories expected to keep your body weight roughly stable. The concept is simple: eat this amount and your weight stays about the same. The challenge is that no outside calculator knows your exact metabolism.

What are my maintenance calories?

Your personal number depends on your body measurements and activity level. Enter your pounds, feet, inches, age, sex, and activity choice above to get an estimate. Then watch your weight trend for a few weeks. If you are gaining or losing, adjust up or down.

How do I find maintenance calories?

To find maintenance calories, use a calculator such as this one, choose the activity level that best fits your routine, and test the result against your scale trend.

How do I calculate maintenance calories?

To calculate maintenance calories, first estimate resting energy needs with an equation, then multiply by an activity factor. This calculator does both steps for you, so you do not need to convert units or complete the arithmetic yourself.

Can a daily calorie calculator tell me my exact needs?

A daily calorie calculator provides a useful starting estimate, but it cannot tell you your exact needs. Test its result over a few weeks and look at the overall weight trend rather than one reading.

Why do two people at the same weight have different maintenance calories?

Two people at the same weight can have different maintenance calories because the estimate also uses other information, including height, age, sex, and activity level. Individual biology also creates real variation around any calculated result.

What happens if I eat below maintenance calories long term?

Eating below maintenance calories long term creates a calorie deficit, so the result is generally weight loss rather than weight maintenance. The calculator also floors its weight-loss figure at 1,200 calories for women and 1,500 for men.

What is the difference between BMR and maintenance calories?

BMR is the energy your body uses at rest, while maintenance calories include an activity adjustment. This calculator estimates resting needs with Mifflin-St Jeor, then applies an activity factor to estimate your daily maintenance level.

Do my maintenance calories change as I lose weight?

Your maintenance calories can change as you lose weight because the information used by the estimate changes. Recheck the calculator when your weight changes meaningfully, and test the new result against your trend.