Find the exact calories to hold your weight stable. Uses Mifflin-St Jeor BMR with your activity level to compute your personal TDEE, shows maintenance calories across all five activity levels so you can see how lifestyle changes affect the number, gives you a 100-calorie maintenance range instead of a single rigid target, computes protein, carb and fat targets, and flags how fast your weight would drift at 200 calories above or below maintenance.
📊 All 5 Activity Levels📐 Maintenance Range🥩 Macro Breakdown⚠️ Weight Drift Guide📈 Activity Bar Chart📄 PDF Maintenance Plan
Age
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Height
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Weight to Maintain
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Enter the weight you want to maintain. Use your current weight or your goal weight to plan ahead.
Height
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Weight to Maintain
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Activity Level
The results also show maintenance calories for all five activity levels so you can see how a lifestyle change would shift your number.
📊 Maintenance Results
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Enter your sex, age, height, weight and activity level, then click Calculate Maintenance to see your daily calorie target to hold your weight stable.
Calories Per Day to Maintain Weight
BMR (Cal at Rest)
P / C / F (grams)
Weight Drift Guide
Maintenance Calories at All 5 Activity Levels
Protein
Carbohydrates
Fat
Maintenance Calories by Activity Level
Weight Maintenance Science: Why Your Maintenance Calories Are Not a Single Number
Weight maintenance is the metabolic state in which caloric intake equals caloric expenditure over time. This sounds simple but it is harder to sustain than either gaining or losing weight, because the body’s energy expenditure is not fixed. It varies daily based on activity, body temperature regulation, hormonal cycles, sleep, and what you ate the day before. Understanding this variability is what separates a realistic maintenance approach from the frustration of trying to eat exactly 2,043 calories every single day and wondering why the scale still moves.
The key concept is that maintenance calories are a range, not a point. Your TDEE (Total Daily Energy Expenditure) is the average energy expenditure over days and weeks, computed from your BMR (resting caloric burn from the Mifflin-St Jeor equation) multiplied by your physical activity level. On any given day, your actual expenditure may be 100 to 200 calories above or below that average due to NEAT variability (spontaneous movement, fidgeting, postural shifts) alone. Trying to hit a precise calorie number every day creates unnecessary anxiety. Operating within a maintenance range of roughly TDEE minus 50 to TDEE plus 50 gives you a practical target band that accounts for normal daily variability and is far easier to sustain long-term than a single rigid number.
Activity Level Is the Biggest Lever in Your Maintenance Number
The difference in maintenance calories between a sedentary lifestyle (activity multiplier 1.2) and a very active lifestyle (multiplier 1.725) is approximately 500 to 700 calories per day for most US adults. That gap is as large as the entire daily calorie deficit used for moderate fat loss. The activity comparison in this calculator shows your maintenance calories at all five activity levels simultaneously, which is a powerful planning tool.
If you currently maintain at 1,900 calories as a sedentary desk worker and you add three workout sessions per week (moving to Lightly Active), your maintenance rises to approximately 2,175 calories. If you add a daily walking habit on top of that (Moderately Active), it rises further to approximately 2,390 calories. Increasing activity is therefore not just a weight loss strategy: it directly raises the maintenance calorie level at which you can sustain your goal weight, giving you far more dietary flexibility and reducing the chronic restriction that causes many long-term maintenance failures.
How This Weight Maintenance Calculator Uses Mifflin-St Jeor to Find Your Personal Calorie Floor
The calculation begins with your BMR (Basal Metabolic Rate), the calories your body burns at complete rest to sustain essential functions: breathing, circulation, temperature regulation, cellular repair, and organ function. The Mifflin-St Jeor equation computes BMR from your weight in kilograms, height in centimeters, age in years, and sex, using the formula: BMR equals (10 times weight in kg) plus (6.25 times height in cm) minus (5 times age), plus 5 for men or minus 161 for women.
Your TDEE is then calculated by multiplying BMR by the PAL (Physical Activity Level) factor for your chosen activity level. This calculator provides five PAL options matching the FAO/WHO/UNU standards used in the US Dietary Reference Intakes. The result is your estimated maintenance calorie target: the daily caloric intake at which your body weight remains stable over time when food intake is tracked accurately. The calculator also displays your maintenance at all five activity levels, so you can immediately see how a lifestyle change (starting a gym routine, taking a desk job, beginning a walking habit) would shift your maintenance number without needing to re-enter data.
Three US Weight Maintenance Examples: Post-Diet Transition, Long-Term Maintenance and Activity Change
Seattle, WA: Post-Diet Transition
Female, 34y, 5’5″, reached goal of 145 lbs, lightly active
BMR1,399 cal/day
TDEE maintenance1,924 cal/day
Maintenance range1,874 to 1,974
Protein target144g/day (30%)
Drift at +200 cal+0.4 lbs/week
Chicago, IL: Long-Term Maintenance
Male, 48y, 5’11”, steady at 182 lbs, moderately active
BMR1,892 cal/day
TDEE maintenance2,933 cal/day
Maintenance range2,883 to 2,983
Protein target220g/day (30%)
Drift at +200 cal+0.4 lbs/week
Phoenix, AZ: Activity Level Change
Female, 29y, 5’3″, 135 lbs, switched from sedentary to very active
Sedentary TDEE1,583 cal/day
Very active TDEE2,271 cal/day
Maintenance gain+688 cal/day flexibility
Protein (very active)170g/day
ResultMaintained weight at higher intake
Why Most US Adults Regain Weight After Dieting and the Maintenance Behaviors That Prevent It
Weight regain after a diet is not a character flaw. It is a predictable biological response to the conditions created by the diet itself. Two major mechanisms drive it. First, metabolic adaptation: the body reduces its metabolic rate during prolonged caloric restriction, so the maintenance calorie level at the end of a diet is lower than it was at the same weight before the diet started. Second, hormonal changes: leptin (the satiety hormone) drops during caloric restriction, and ghrelin (the hunger hormone) rises. Both remain dysregulated for months after the diet ends, creating persistent hunger and reduced fullness signals that make eating above maintenance feel normal and even necessary.
The National Weight Control Registry (NWCR), which tracks over 10,000 US adults who have successfully maintained a weight loss of at least 30 pounds for at least one year, provides the most comprehensive behavioral data on what actually works for long-term maintenance. Registry members consistently report a handful of behaviors that distinguish successful maintainers from those who regain: weekly weigh-ins (allowing for early detection of 3 to 5-pound weight creep before it becomes larger regain), continued daily physical activity (most report 60 or more minutes per day of moderate activity, which also elevates their maintenance calorie level), consistent food monitoring (not necessarily rigid calorie counting, but maintaining awareness of intake), eating a high-protein diet that supports lean mass and satiety, and having an explicit action plan for when weight creeps up.
The action plan detail is critical. Many US adults who successfully reach a goal weight have no defined plan for what to do when they see 3 to 5 pounds of gain creep in over a few weeks. Without a plan, small gains become large ones because there is no trigger point for action. Registry members who specify the exact pound threshold at which they will return to a brief calorie deficit (typically 3 to 5 lbs above goal weight) and the exact approach they will use (e.g., return to a 250-calorie deficit for 3 to 4 weeks, then reassess) show significantly better long-term outcomes than those who maintain vaguely with no defined response protocol. For more information on evidence-based maintenance, the NIDDK Keep It Off resources provide clinically reviewed guidance.
Macronutrient Targets for Weight Maintenance: Protein, Carbohydrates and Fat at Your Calorie Level
At maintenance calories, the macro split that best supports lean mass preservation, satiety, and metabolic health is approximately 30% protein, 40% carbohydrates, and 30% fat. This is the starting distribution this calculator uses, and the gram targets shown in the results are computed from those percentages at your specific TDEE. However, maintenance macro targets are significantly more flexible than the targets during an active fat loss phase, because you are not in a caloric deficit and muscle protein breakdown is therefore lower.
Protein remains the most important macro even at maintenance for several reasons. Protein has the highest thermic effect of any macronutrient (20 to 30% of its calories are burned in the process of digesting, absorbing, and utilizing it, compared to 5 to 10% for carbohydrates and 0 to 3% for fat). This means that a higher-protein maintenance diet has a slightly lower effective caloric value than a lower-protein diet at the same total calories. Protein also produces stronger satiety signals than carbohydrates or fat, which helps maintain a consistent intake at the maintenance level without constant hunger. The minimum protein for lean mass preservation at maintenance is 1.2 to 1.6 grams per kilogram of body weight, with the higher end appropriate for older adults (over 65) and people with higher activity levels.
Carbohydrate and fat targets at maintenance are more flexible and should be distributed according to personal preference and dietary pattern, as long as protein minimums are met and calories remain at maintenance. A moderately active US adult eating at maintenance can sustain excellent metabolic health on a wide range of carbohydrate and fat splits, from lower-carbohydrate patterns (30% carb, 40% fat) to higher-carbohydrate patterns (50% carb, 20% fat), as long as carbohydrate quality (whole grains, legumes, vegetables, fruit over refined carbohydrates and added sugars) and fat quality (unsaturated fats from nuts, olive oil, fish over saturated and trans fats) meet the USDA Dietary Guidelines for Americans 2020-2025 recommendations.
01
Use a 100-Calorie Maintenance Range, Not a Single Number
Your calculated TDEE is an average. Actual daily caloric expenditure varies by 150 to 250 calories depending on NEAT, sleep, temperature, and hormones. Trying to hit a precise number like 2,043 calories every day creates unnecessary stress and is not physiologically meaningful. Instead, use the maintenance range this calculator provides (TDEE minus 50 to TDEE plus 50 calories) as your daily target band. Averaging within this range across a week is what matters, not hitting it exactly each day. On days with more activity, eating closer to the top of the range is fine. On rest days, the lower end is appropriate. This flexibility is what makes maintenance genuinely sustainable for years rather than weeks.
02
Weigh Yourself Weekly and Set a 5-Pound Drift Limit
The single most effective behavior for long-term weight maintenance identified by National Weight Control Registry data is consistent self-weighing. Weekly weigh-ins on the same day, at the same time, in the same conditions provide early warning of weight drift before it becomes significant regain. The key is having a pre-defined response when you hit a specific threshold above your maintenance weight. A practical, widely-used protocol: if your weight is 3 to 5 pounds above your maintenance target for 2 or more consecutive weekly weigh-ins, return to a 250-calorie daily deficit for 4 to 6 weeks. This creates roughly 0.5 pounds per week of loss, covering the 3 to 5 pounds of drift in 6 to 10 weeks without a dramatic restriction that triggers hunger and rebound. Recalculate your maintenance calories with this calculator each time you return to deficit to account for any further TDEE changes.
03
Recalculate Maintenance Calories Every 6 Months or With Major Lifestyle Changes
Maintenance calories change as you age (BMR decreases approximately 1 to 2% per decade), as your activity level changes (a new job, a new exercise habit, a move to a more walkable city), and with significant hormonal shifts (perimenopause, thyroid changes, medication changes). A maintenance calorie target that was accurate at age 40 may overestimate your actual TDEE by 100 to 200 calories by age 50 even without a weight change. Run this calculator fresh every 6 months and whenever you have a significant lifestyle change. The 6-month interval ensures your maintenance target stays calibrated to your actual metabolic state rather than drifting toward an outdated formula result that no longer matches your body. Also recalculate immediately any time you experience a weight plateau while eating what you believe is your maintenance level, as this is often a sign that your actual TDEE has shifted below the calculated estimate.
Weight Maintenance Calorie Questions US Adults Ask Most
The number of calories needed to maintain your weight depends on your height, weight, age, sex, and activity level. For the average American woman (5’4″, 170 lbs, 38 years old, lightly active), maintenance is approximately 2,000 to 2,100 calories per day. For the average American man (5’9″, 200 lbs, 40 years old, moderately active), it is approximately 2,700 to 2,900 calories per day. However, these averages mask substantial individual variation. A shorter, older, sedentary woman may maintain at 1,400 to 1,600 calories. A taller, younger, very active man may maintain at 3,200 to 3,600 calories. Using this calculator with your specific inputs gives a personalized maintenance target using the Mifflin-St Jeor equation (the Academy of Nutrition and Dietetics preferred formula), which is significantly more accurate than population averages for individual use. The maintenance range shown (TDEE minus 50 to TDEE plus 50 calories) is more useful in practice than a single precise number because it accounts for the normal daily variation in energy expenditure that makes hitting an exact calorie target neither possible nor necessary.
Consistently eating 200 calories above maintenance creates a 1,400-calorie weekly surplus, which corresponds to approximately 0.4 pounds of weight gain per week (1,400 divided by 3,500 calories per pound). Over a year, that is approximately 20 pounds of weight gain from a seemingly small daily overconsumption that might feel like nothing more than a slightly larger serving at dinner or an extra snack. The weight drift warning in this calculator shows exactly this calculation for your specific maintenance level. The important implication is that weight regain after a successful diet is very rarely dramatic overeating: it is usually consistent small over-maintenance eating that compounds over months into meaningful regain. This is why regular weigh-ins and a defined response threshold (return to a 250-calorie deficit at 3 to 5 lbs above maintenance) are the most effective behavioral tools for long-term maintenance. The 0.4 pounds per week from 200 calories over also works in reverse: 200 calories below maintenance removes the same 0.4 pounds per week, meaning a very modest reduction is all that is needed to address small amounts of maintenance drift before they become large regain.
Maintenance calories and TDEE are the same thing. TDEE (Total Daily Energy Expenditure) is the name for the estimated total calories your body burns in a day, and maintenance calories is the practical term for the intake level that matches TDEE to keep weight stable. This calculator uses the Mifflin-St Jeor equation to compute your BMR and multiplies it by your PAL (Physical Activity Level) factor to get TDEE, which is then presented as your maintenance calorie target. The TDEE calculation does not directly measure your actual calorie burn (that would require a respiratory metabolic chamber or doubly-labeled water study). It estimates it from your anthropometric data and lifestyle. The estimate is accurate to within approximately 10% of actual TDEE for most healthy adults, which translates to a margin of approximately 150 to 300 calories in practice. Real-world calibration (tracking actual food intake for 3 to 4 weeks while monitoring weight and adjusting if needed) is the most accurate way to find your personal maintenance level, using the TDEE calculation as the starting estimate to calibrate from.
Yes. Most people who successfully maintain weight long-term do not count calories indefinitely. National Weight Control Registry data shows that while many members used structured calorie tracking during their weight loss phase, the majority transition to less structured intake monitoring during maintenance. The key during maintenance is awareness, not precision. Practical approaches that allow maintenance without daily calorie counting include portion consistency (eating consistent meal sizes and compositions that you know produce stable weight, verified by regular weigh-ins), plate method eating (half the plate non-starchy vegetables, quarter lean protein, quarter complex carbohydrate at each meal, which naturally falls within most maintenance calorie ranges for active adults), high-protein eating (which produces stronger satiety and reduces overconsumption without tracking), and regular weigh-ins that catch drift early rather than waiting for a large regain to prompt action. Using this calculator to get your maintenance number is valuable because it gives you a calibrated starting point and a macro framework, even if you choose not to count every calorie after establishing the baseline. Knowing your maintenance is approximately 2,200 calories per day helps you make food choices with awareness of whether a meal pattern is roughly on target, even without logging every item.
Maintenance calories change when you lose weight for two reasons: weight-dependent BMR change and metabolic adaptation. First, the Mifflin-St Jeor BMR formula directly incorporates body weight, and every pound of weight lost reduces BMR by approximately 2 to 2.5 calories per day. A person who loses 30 pounds will therefore have a maintenance TDEE roughly 60 to 75 calories per day lower than before the weight loss, just from the formula-predicted BMR change. Multiply that by the activity factor and the real-world maintenance decrease is 72 to 143 calories per day, entirely from the weight reduction. Second, metabolic adaptation reduces the metabolic rate further beyond what the formula alone predicts. Research from NIH and multiple bariatric studies shows that metabolic rates after significant weight loss are often 200 to 400 calories per day below formula predictions, due to reductions in thyroid hormone (especially T3), decreased spontaneous movement (NEAT), reduced thermic effect of food at lower caloric intake, and increased metabolic efficiency. This is why many people who reach a goal weight and resume eating what they believe is maintenance immediately begin regaining: their real maintenance is lower than their pre-diet maintenance at the same weight. Using this calculator at the goal weight gives the formula-based estimate, and real-world calibration at the new weight is the most accurate way to identify the actual maintenance level post-diet.
Yes, significantly. Increasing your activity level raises your TDEE and therefore your maintenance calorie target. The activity comparison in this calculator shows the maintenance number at all five activity levels so you can immediately see the impact of a lifestyle change. For most US adults, moving from sedentary to moderately active raises maintenance by approximately 350 to 500 calories per day. Moving from moderately active to very active raises it by another 200 to 300 calories per day. This has a profound practical implication: the higher your activity, the more food you can eat while maintaining the same weight. A sedentary woman maintaining at 1,600 calories per day who begins consistent 3 to 5-day-per-week exercise could raise her maintenance to 2,200 calories per day at the same weight, gaining nearly 600 calories of daily dietary flexibility. For people who struggle with maintenance because the calorie targets feel too restrictive to sustain, increasing physical activity is often a more effective and sustainable long-term strategy than trying to maintain at a very low caloric intake. The Mifflin-St Jeor TDEE formula captures this directly: the activity multiplier is applied to the entire BMR, so increases in activity level produce substantial changes in the maintenance calorie output.
The foods that best support weight maintenance are those that produce strong satiety relative to their caloric density, support lean mass preservation, and sustain consistent energy without large blood sugar spikes and crashes that drive overeating. High-protein foods are consistently associated with better long-term weight maintenance in US research: lean meats, poultry, fish, eggs, Greek yogurt, cottage cheese, legumes, and plant proteins all contribute to the protein target (30% of maintenance calories, or 1.2 to 1.6 g/kg minimum) that reduces muscle loss with age and supports satiety. High-fiber foods (vegetables, fruits, whole grains, legumes) add bulk and slow gastric emptying without adding proportional calories, which helps regulate intake without strict calorie tracking. The 2020-2025 Dietary Guidelines for Americans recommends building the maintenance diet around vegetables, fruits, whole grains, lean proteins, and low-fat or fat-free dairy (or fortified alternatives), with limited added sugars, saturated fats, and sodium. No single food category is forbidden in a maintenance approach, but the emphasis on high-protein and high-fiber foods provides a practical dietary pattern that naturally supports stable weight without requiring precise calorie accounting on an ongoing basis.
The recommended transition from a calorie deficit to maintenance is gradual, not immediate. Jumping directly from your deficit intake to the full calculated maintenance level often causes faster weight regain than a gradual increase, for two reasons. First, your TDEE at goal weight is lower than your original TDEE before the diet, because the Mifflin-St Jeor BMR is lower at the lower weight. If you jump to the original pre-diet TDEE, you are likely eating above your new maintenance level. Second, metabolic adaptation during the deficit has reduced your actual TDEE below even the formula-predicted level at goal weight, so the formula-based maintenance estimate may still overestimate your real maintenance for a period after the diet. A reverse diet protocol minimizes these issues: increase daily calories by 100 to 150 per week from the deficit level until you reach the formula-calculated maintenance for your goal weight. This gradual increase gives the body time to restore metabolic rate (leptin, thyroid hormone, NEAT) without producing rapid fat gain. Run this calculator at your goal weight to get the target maintenance number, then reverse-diet up to it over 4 to 8 weeks from wherever your deficit calories are. Monitor weight weekly during the transition and slow the calorie increases if you see more than 1 pound per week of scale increase (some early increase from glycogen and water restoration is expected and is not fat gain).
A 200-pound man’s maintenance calories vary substantially based on height, age, and activity level, but typical ranges using Mifflin-St Jeor are: a 35-year-old at 5’10” who is sedentary: approximately 2,350 cal/day; the same man at lightly active: approximately 2,700 cal/day; moderately active: approximately 3,040 cal/day; very active: approximately 3,380 cal/day; extra active: approximately 3,720 cal/day. A 50-year-old at 5’10” has a BMR approximately 75 calories per day lower (due to the age term in Mifflin-St Jeor reducing BMR by 5 cal/year), putting his moderately active TDEE at approximately 2,925 cal/day. A 5’8″ version of the same 35-year-old has a BMR approximately 12.5 calories per day lower, moderately active TDEE approximately 2,995 cal/day. The most accurate result for any individual is obtained by entering their specific measurements in this calculator rather than relying on general estimates, because the interaction between height, weight, age, sex, and activity creates substantial individual variation even within the same body weight. A 200-pound man and a 200-pound woman at the same height and age have different maintenance calories due to the sex term in Mifflin-St Jeor (plus 5 for men versus minus 161 for women), reflecting the average difference in lean mass to fat mass ratio between sexes.
Yes. The Mifflin-St Jeor equation reduces BMR by 5 calories per year of age, reflecting the gradual metabolic rate decline with aging that occurs primarily through age-related muscle loss (sarcopenia, which reduces the metabolically active lean mass that drives resting caloric burn) and some reduction in organ metabolic rates. A person’s maintenance calories at age 50 are approximately 75 calories per day lower than at age 35 at the same weight and activity level (15 years times 5 cal/year times activity multiplier of approximately 1.55 equals 116 cal/day, but the change is often partially offset by concurrent weight changes). Over the 20 years from age 40 to age 60, this age-related reduction in maintenance (approximately 10 to 15 calories per year after activity multiplier) accumulates to a meaningful total. Many US adults in their 50s who are gaining weight gradually without obvious dietary changes are experiencing this exact dynamic: their maintenance has declined by 100 to 200 calories per day since their 30s, while their intake has remained relatively constant, creating a small chronic surplus. Re-running this calculator every few years (or any time unexplained gradual weight gain begins) is the most practical way to identify and address this age-related maintenance shift. The solution for many older adults is to increase physical activity (which raises the activity multiplier and partially offsets the age-related BMR decline) while moderately reducing caloric intake to the new, lower maintenance level.
Most US behavioral health researchers and clinical dietitians consider maintenance more challenging than the initial weight loss for several interconnected reasons. During the active weight loss phase, the goal is clear and binary (am I in a deficit or not?), the behavioral structure is well-defined (track food, hit a specific calorie target), and the scale provides consistent near-term positive reinforcement as it declines. Maintenance removes all three of these drivers: the goal becomes ambiguous (maintaining a range rather than pursuing a clear number), the behavioral structure loosens (you can eat more but not too much, which is harder to define than a firm calorie cap), and the scale feedback is no longer consistently rewarding (stability is the goal, but the scale also moves up on maintenance days without it meaning failure). Biologically, the hormonal changes from the diet (lower leptin, higher ghrelin, higher appetite) persist for months to a year after the diet ends, creating hunger and cravings that push against the new maintenance intake level. The NWCR data shows that successful long-term maintainers compensate for these challenges by replacing the structure of the diet phase with a different structure: regular weigh-ins, consistent physical activity, continued food monitoring, and defined response protocols for weight drift. Maintenance is a skill that requires ongoing active management, not a passive state achieved by stopping the diet. Understanding this framing is itself one of the most important factors in long-term success.
Protein plays three distinct roles in successful weight maintenance that make it the most important macro to prioritize at the maintenance calorie level. First, satiety: protein produces the strongest satiety response of any macronutrient through both hormonal mechanisms (increasing GLP-1 and PYY, decreasing ghrelin) and mechanical mechanisms (slowing gastric emptying). Studies comparing higher-protein maintenance diets (25 to 35% of calories) to moderate-protein diets (10 to 15% of calories) at the same total caloric intake consistently show lower hunger ratings and better weight maintenance adherence with the higher-protein approach. Second, thermogenesis: protein has a dietary thermic effect of 20 to 30% (compared to 5 to 10% for carbohydrates and 0 to 3% for fat), meaning a maintenance diet with 30% of calories from protein effectively burns more calories in digestion than a diet with the same caloric total but lower protein. This creates a small but meaningful buffer against weight regain. Third, lean mass preservation: sarcopenia (age-related muscle loss) occurs at all ages past approximately 30 and accelerates after 50, progressively reducing BMR. Eating 1.2 to 1.6 grams of protein per kilogram of body weight per day (higher than the general 0.8 g/kg RDA) in combination with resistance training minimizes this muscle loss, preserving the metabolically active lean mass that keeps maintenance calories higher as you age. The protein targets in this calculator reflect the 30% maintenance macro recommendation and the 1.2 to 1.6 g/kg minimum range, both of which exceed the general adult RDA and are supported by research on healthy weight maintenance.
Yes, both significantly. Sleep deprivation reduces TDEE through two pathways. First, insufficient sleep reduces voluntary physical activity and NEAT (spontaneous movement), lowering the activity component of TDEE by an estimated 100 to 200 calories per day. Second, and more dramatically, sleep deprivation increases hunger (particularly for high-calorie, high-carbohydrate foods) by reducing leptin and increasing ghrelin even more than caloric restriction does, making it much harder to stay at maintenance intake. Studies at the University of Chicago found that sleep-deprived individuals consumed an additional 300 to 400 calories per day compared to well-rested periods, primarily from snacks and after-dinner eating. Chronic stress similarly disrupts weight maintenance through cortisol elevation: cortisol stimulates appetite (particularly for energy-dense foods), promotes fat storage (especially visceral abdominal fat), increases emotional eating behavior, and reduces voluntary physical activity through fatigue. These effects are not captured in the TDEE formula because they are behavioral and hormonal rather than formula-modeled. US adults who find their weight stable at their calculated maintenance during low-stress, well-rested periods but who gain weight during high-stress, poor-sleep periods are experiencing these hormonal effects on intake and expenditure. Managing sleep and stress as part of a maintenance approach is therefore as important as tracking calories, with 7 to 9 hours of sleep per night (per the AASM recommendation) and evidence-based stress management (exercise, mindfulness, social support) directly supporting more stable weight maintenance outcomes.
For post-menopausal women, the Mifflin-St Jeor formula still provides a useful baseline, but its output may overestimate actual maintenance by a meaningful amount. The decline in estrogen at menopause reduces lean mass accrual rate, shifts fat distribution toward visceral (abdominal) adiposity, and reduces overall metabolic rate through mechanisms partially independent of the body composition change that the age term in the formula captures. Research has found that resting metabolic rate in post-menopausal women averages approximately 100 to 150 calories per day lower than in pre-menopausal women of the same age, height, and weight, even after controlling for body composition. This means the Mifflin-St Jeor maintenance estimate should be treated as an upper boundary for post-menopausal women, with real-world calibration particularly important. If you are post-menopausal and your scale is drifting upward while eating what the calculator suggests as maintenance, the most likely explanation is that your actual maintenance is 100 to 200 calories below the formula prediction. Adjusting the intake downward by 100 to 150 calories and monitoring for 3 to 4 weeks will confirm whether weight stabilizes. Maintaining physical activity (particularly resistance training to slow sarcopenia) and adequate protein intake are more important for post-menopausal women than for any other demographic group in preserving the lean mass that keeps maintenance calories as high as possible. The NAMS (North American Menopause Society) and NIDDK both provide resources on weight management in post-menopausal women at their respective websites.
The most authoritative US resources on long-term weight maintenance include the NIDDK (National Institute of Diabetes and Digestive and Kidney Diseases) Keep It Off resources at niddk.nih.gov/health-information/weight-management/keep-it-off, which provide clinically reviewed behavioral guidance on successful maintenance strategies. The National Weight Control Registry at nwcr.ws is a research registry that tracks over 10,000 US adults who have successfully maintained significant weight loss and provides public-facing data on the behaviors associated with their success. The Academy of Nutrition and Dietetics at eatright.org maintains a dietitian finder for US adults who want individualized maintenance guidance from a registered dietitian nutritionist. The USDA Dietary Guidelines for Americans 2020-2025 at dietaryguidelines.gov provide the official US nutritional framework including caloric guidance by age, sex, and activity level for maintenance. The CDC Healthy Weight resources at cdc.gov/healthyweight include a section specifically on maintaining weight loss. For related tools on this site: the TDEE Calculator provides full component breakdown of your energy expenditure, the Calorie Deficit Calculator helps plan a return to deficit when maintenance weight drifts up, and the Bulking Calorie Calculator helps plan a controlled surplus phase if the goal is lean mass building while maintaining approximately the same body composition.
Weekly average caloric intake (not daily intake) is what drives weight change or maintenance over time. Eating at maintenance on 5 weekdays and eating 400 calories above maintenance on 2 weekend days creates a weekly surplus of 800 calories, which adds approximately 0.23 pounds per week (800 divided by 3,500). Over a year, that is approximately 12 pounds of gradual gain from a pattern that feels like “mostly maintaining with a bit more flexibility on weekends.” The practical management approach used by many National Weight Control Registry members involves tracking the weekly total rather than the daily target: 5 days at maintenance plus 2 days at slightly above, versus a strict 7-day-a-week uniform intake. If you know your weekends tend to run 300 to 400 calories higher, eating 100 to 150 calories below maintenance on weekdays creates a weekly average at maintenance without requiring perfect weekend discipline. This “bank calories for the weekend” approach is not ideal from a satiety standpoint (eating 100 calories below maintenance is a very small restriction that usually produces negligible hunger), but it is psychologically much more sustainable for US adults with active social lives than trying to enforce weekday-level intake 7 days a week. Run the numbers with this calculator to find your specific weekday target if you want to use this strategy, subtracting the anticipated weekend surplus across the 5 weekdays to find the daily intake that produces the right weekly average.
This Weight Maintenance Calculator uses the Mifflin-St Jeor equation (Mifflin MD et al., J Am Diet Assoc, 1990;90(3):375-381) and standard FAO/WHO/UNU physical activity level multipliers to estimate TDEE. The weight drift calculation uses the 3,500-calorie-per-pound approximation. Macro targets (30% protein, 40% carbohydrates, 30% fat) represent one evidence-informed starting distribution and may not be appropriate for all individuals. Protein minimums (1.2 to 1.6 g/kg) follow ACSM and general adult protein research. TDEE estimates are accurate to within approximately 10% of measured values for most healthy adults using indirect calorimetry.
All results are for informational and educational purposes only and do not constitute medical, nutritional, or dietary advice. Adults with medical conditions, eating disorder history, post-bariatric status, or complex nutritional needs should work with a registered dietitian nutritionist. USCalculators.com has no affiliation with any government agency or professional body. Authoritative sources: NIDDK Weight Management, USDA Dietary Guidelines 2020-2025, Academy of Nutrition and Dietetics.