How Many Calories Should I Eat to Maintain My Weight?

Maintenance calories are the exact number of calories your body needs to keep your weight stable — no gain, no loss. This number is your total daily energy expenditure, or TDEE, and it is the single most important figure in nutrition. Every goal — whether losing fat, gaining muscle, or simply staying healthy at your current weight — starts with knowing your maintenance level. The problem is that most people either never find it or rely on a calculator estimate that can be off by 200-400 calories. Here is how to find your real number.

What Are Maintenance Calories?

Maintenance calories are the total energy your body uses in a 24-hour period. This includes four components:

Component	Description	Typical Percentage of TDEE
Basal Metabolic Rate (BMR)	Energy for basic life functions at complete rest	60-75%
Non-Exercise Activity Thermogenesis (NEAT)	Fidgeting, walking, standing, daily tasks	10-20%
Thermic Effect of Food (TEF)	Energy to digest, absorb, and process food	8-12%
Exercise Activity Thermogenesis (EAT)	Deliberate exercise and sports	5-15%

When the calories you eat match the total of these four components, your weight stays stable. Eat more consistently, and you gain weight. Eat less consistently, and you lose weight. The relationship is governed by the first law of thermodynamics, confirmed by decades of metabolic research including the classic overfeeding studies by Bouchard et al. (1990) published in the New England Journal of Medicine.

How to Estimate Your Maintenance Calories

Step 1: Calculate Your BMR

Use the Mifflin-St Jeor equation, which Frankenfield et al. (2005) found to be the most accurate BMR prediction formula for healthy adults in a review published in the Journal of the American Dietetic Association:

• Men: BMR = (10 x weight in kg) + (6.25 x height in cm) - (5 x age) + 5
• Women: BMR = (10 x weight in kg) + (6.25 x height in cm) - (5 x age) - 161

Step 2: Multiply by Your Activity Factor

Activity Level	Description	Multiplier
Sedentary	Desk job, minimal walking	1.2
Lightly active	1-3 days of light exercise per week	1.375
Moderately active	3-5 days of moderate exercise per week	1.55
Very active	6-7 days of hard exercise per week	1.725
Extremely active	Athlete or very physical job + exercise	1.9

Example: A 30-year-old woman, 168 cm, 65 kg, who exercises 3 times per week:

• BMR = (10 x 65) + (6.25 x 168) - (5 x 30) - 161 = 650 + 1,050 - 150 - 161 = 1,389
• TDEE = 1,389 x 1.55 = 2,153 calories per day

This is her estimated maintenance. It is a starting point, not a final answer.

TDEE Maintenance Calorie Tables

Women — Estimated Maintenance Calories by Age and Activity Level

Age	Height	Weight	Sedentary	Lightly Active	Moderately Active	Very Active
20	163 cm	58 kg	1,562	1,789	2,017	2,244
25	165 cm	62 kg	1,610	1,844	2,079	2,313
30	165 cm	65 kg	1,614	1,849	2,084	2,319
35	168 cm	68 kg	1,650	1,890	2,130	2,370
40	165 cm	70 kg	1,622	1,858	2,094	2,330
45	163 cm	68 kg	1,571	1,800	2,029	2,258
50	163 cm	65 kg	1,517	1,738	1,958	2,179
55	160 cm	65 kg	1,477	1,692	1,907	2,121
60	160 cm	63 kg	1,434	1,642	1,851	2,059

Men — Estimated Maintenance Calories by Age and Activity Level

Age	Height	Weight	Sedentary	Lightly Active	Moderately Active	Very Active
20	178 cm	75 kg	2,055	2,354	2,654	2,953
25	180 cm	80 kg	2,108	2,414	2,720	3,027
30	180 cm	82 kg	2,114	2,421	2,729	3,036
35	178 cm	82 kg	2,068	2,368	2,669	2,970
40	178 cm	85 kg	2,068	2,368	2,669	2,970
45	175 cm	83 kg	1,997	2,287	2,578	2,868
50	178 cm	82 kg	1,979	2,267	2,555	2,842
55	175 cm	80 kg	1,919	2,198	2,478	2,757
60	175 cm	78 kg	1,862	2,133	2,404	2,675

How to Find Your True Maintenance Calories

Calculator estimates are useful starting points, but they carry an error margin of 100-300 calories in either direction. To find your actual maintenance level, you need to track and adjust.

The 2-3 Week Calibration Method

Week 1: Eat at your calculated TDEE estimate. Log every meal accurately. Weigh yourself daily at the same time (ideally first thing in the morning, after using the bathroom) and record the average for the week.

Week 2: Compare your average weight to the previous week. If your weight dropped, your true maintenance is higher than your estimate — add 100-200 calories. If your weight increased, your true maintenance is lower — subtract 100-200 calories.

Week 3: Repeat the process with your adjusted number. When your weekly average weight stays within 0.2-0.5 kg (0.5-1 lb) of the previous week, you have found your maintenance.

This method was validated by research from Lichtman et al. (1992) in the New England Journal of Medicine, which demonstrated that self-reported intake without careful tracking leads to systematic underreporting of 30-50%. Precise tracking eliminates this bias.

Why Daily Weight Fluctuations Don't Matter

Your weight can fluctuate by 1-3 kg (2-6 lb) within a single day due to water retention, sodium intake, carbohydrate stores, and digestive contents. A study by Cointry et al. published in Physiological Measurement (2019) found that day-to-day body weight variation averages 0.35% of total body weight. This is why weekly averages, not daily numbers, determine whether you are at maintenance.

Why Knowing Your Maintenance Calories Matters

Diet Breaks During Weight Loss

Prolonged calorie restriction triggers metabolic adaptation. Research by Trexler et al. (2014), published in the Journal of the International Society of Sports Nutrition, found that planned diet breaks — periods of eating at maintenance — can reduce metabolic adaptation, improve leptin signaling, and improve long-term diet adherence. A typical protocol is 1-2 weeks at maintenance for every 6-12 weeks of dieting.

Post-Weight-Loss Transition

The period after reaching a weight loss goal is when most people regain weight. A meta-analysis by Anderson et al. (2001) in The American Journal of Clinical Nutrition found that within 5 years, the majority of dieters regain most of the weight lost. The primary reason: they never properly transitioned to maintenance calories. Instead, they either continued restricting (leading to burnout and bingeing) or returned to pre-diet eating habits (which created the surplus that caused the original weight gain).

Knowing your new, lower maintenance calories after weight loss is essential for long-term success.

Body Recomposition

Body recomposition — simultaneously losing fat and gaining muscle — works best at or very near maintenance calories, particularly for beginners and those returning to training after a break. A study by Barakat et al. (2020) in Strength and Conditioning Journal found that eating at maintenance while performing resistance training produced meaningful changes in body composition without requiring a calorie deficit.

The Concept of Reverse Dieting Into Maintenance

If you have been eating in a significant calorie deficit for an extended period, jumping straight to maintenance calories can cause rapid weight regain — not because maintenance is "too many calories," but because your metabolism has temporarily adapted to lower intake through reduced NEAT, lower thyroid output, and improved metabolic efficiency.

Reverse dieting is the practice of gradually increasing calories by 50-150 per week until you reach your maintenance level. This approach:

Reverse Dieting Benefit	Mechanism
Minimizes fat regain	Gradual increase allows metabolic rate to recover
Restores NEAT levels	Higher food intake increases spontaneous movement
Normalizes hunger hormones	Leptin and ghrelin gradually return to baseline
Improves diet adherence	Psychological relief from adding food back slowly

A practical reverse dieting timeline might look like this:

Week	Calorie Addition	New Daily Total (starting from 1,500)
1	+100	1,600
2	+100	1,700
3	+100	1,800
4	+100	1,900
5	+50 (monitor weight)	1,950
6	+50 (stabilize)	2,000 (maintenance reached)

Common Maintenance Calorie Mistakes

Using a single calculation and never adjusting. Your TDEE changes as your weight, age, activity level, and body composition change. A maintenance number from a year ago may no longer apply. Research by Muller et al. (2004), published in the International Journal of Obesity, showed that BMR decreases by approximately 1-2% per decade of aging after 20.

Averaging out weekday and weekend eating. Many people eat moderately on weekdays and significantly more on weekends. If your maintenance is 2,200 calories per day, eating 2,000 Monday through Friday and 3,000 on Saturday and Sunday creates a weekly average of 2,286 — a small but consistent surplus that adds up over months.

Confusing water weight changes with real weight changes. Starting creatine, changing sodium intake, or beginning a high-carbohydrate diet after a period of low-carb eating can cause 1-3 kg of water retention overnight. This is not fat gain. Wait 1-2 weeks for water balance to stabilize before making calorie adjustments.

Not tracking consistently enough. Tracking only some meals or only on "good" days introduces systematic bias. Research consistently shows that people underreport calorie intake by 20-50%, and this underreporting is worse on high-intake days (Schoeller, 1995, The Journal of Nutrition).

How to Track Maintenance Calories Effectively

Finding and maintaining your maintenance level requires consistent, accurate food logging — not forever, but at least for the initial 2-3 week calibration period and periodic check-ins thereafter.

Nutrola is designed to make this kind of precision tracking sustainable. Instead of manually searching databases and estimating portion sizes, you can snap a photo of your meal with Nutrola's AI recognition, scan a barcode, or describe your food by voice. The app draws from a database of over 1.8 million verified foods tracking 100+ nutrients, so your logs reflect reality rather than rough estimates.

For the maintenance calibration method specifically, consistent daily logging is critical, and Nutrola's speed — typically under 10 seconds per food entry — removes the friction that causes most people to abandon tracking within the first week. The recipe import feature handles home-cooked meals, which are the most commonly mislogged food category. At 2.50 euros per month with zero ads and full support for Apple Watch, Wear OS, and 9 languages, there is no barrier to getting the data you need to find your true maintenance level.

Frequently Asked Questions

How many calories do I need to maintain 150 pounds?

There is no single answer because maintenance depends on height, age, sex, and activity level — not weight alone. A 150-pound (68 kg) sedentary 40-year-old woman at 5'5" needs approximately 1,650 calories. A 150-pound moderately active 25-year-old man at 5'10" needs approximately 2,500 calories. Use the tables above and then calibrate with 2-3 weeks of tracking.

Does my maintenance change after losing weight?

Yes. When you lose weight, your body requires fewer calories because there is less tissue to maintain. Additionally, metabolic adaptation during dieting can temporarily lower your maintenance by 5-15% beyond what weight loss alone would predict (Rosenbaum and Leibel, 2010, International Journal of Obesity). This is why post-diet maintenance requires careful recalibration.

How long should I eat at maintenance between dieting phases?

Most evidence-based practitioners recommend a minimum of 2-4 weeks at maintenance between dieting phases. Longer breaks of 8-12 weeks are beneficial for those who have been dieting for extended periods. The key indicator is stable weight and normalized hunger cues.

Can I maintain my weight without counting calories?

Some people develop strong enough intuitive eating skills to maintain without tracking. However, research by Carels et al. (2005) in Eating Behaviors found that self-monitoring (including calorie tracking) was the single strongest predictor of long-term weight maintenance. Periodic tracking — even just one week per month — can serve as a calibration tool to keep you on track.

The Bottom Line

Your maintenance calories are your TDEE — the total energy your body uses in a day. For most women, this falls between 1,600 and 2,400 calories depending on activity level. For most men, between 2,000 and 3,000 calories. A calculator gives you a starting estimate, but the only way to find your true maintenance is to track your intake, monitor your weight for 2-3 weeks, and adjust based on real data.

Knowing this number is foundational. It determines your deficit for fat loss, your surplus for muscle gain, your target during diet breaks, and your long-term sustainable intake after reaching any goal. Track with precision using Nutrola, calibrate your number with the method outlined above, and you will have the most important piece of your nutrition puzzle locked in.