How many calories do I need to maintain my weight?

The idea of increasing your calories can feel a little unsettling after eating in a deficit while actively losing weight. You might wonder how much more you should eat, or whether eating more could undo the progress you've worked so hard to achieve.

Moving into the maintenance phase doesn't mean abandoning the healthy habits that helped you lose weight in the first place. Instead, you'll need to find the balance that allows you to nourish your body, feel satisfied, and maintain your results over the long term.

In this guide, we'll explore how many calories you may need to maintain your weight, what can affect your calorie needs, and how to approach maintenance with confidence.

Key points

• Maintenance calories are different for everyone and can change over time based on your lifestyle, activity levels and health.
• You don't have to count calories to maintain your weight, but understanding your energy needs can help you find the approach that works best for you.
• Focus on long-term balance, not perfection, by combining nourishing food choices, healthy habits and self-compassion.

What are maintenance calories?

Understanding your maintenance calories can provide a useful starting point for building a sustainable routine. In simple terms, maintenance calories are the number of calories your body needs each day to keep your weight relatively stable. Consistently eating below this amount will usually lead to weight loss, while regularly eating above it may lead to weight gain.

One way to estimate your maintenance calories is by calculating your basal metabolic rate (BMR). This is the amount of energy your body needs to carry out its basic functions at rest, such as breathing, circulation, and cell repair. From there, your BMR is adjusted based on your daily activity levels to give a better estimate of how many calories your body uses in a typical day. This can provide a useful starting point, although it's important to remember that calorie needs vary from person to person and may change over time.

Why calorie needs change after weight loss

If you've lost a significant amount of weight, you may find that you need fewer calories to maintain your weight than someone who has always been the same size. This is because weight loss can lead to changes in your metabolism, meaning your body uses less energy than before.

Calorie needs vary from person to person. Factors like your age, sex, activity levels, muscle mass, metabolism and overall health all play a role. If you're thinking about making significant changes to your diet, it's a good idea to speak with a healthcare professional for personalised advice.

Do you need to count calories during maintenance?

In short, no. You do not need to count calories during weight maintenance. However, you may want to. Ultimately, there is no “right way” to maintain your weight, only the way that works for you. For some, calorie counting is the easiest way to sustain weight. Others prefer a more intuitive approach that enables them to respond to their body’s needs and weight fluctuations, relying on daily habits that have, in time, become second nature.

While there is no single correct approach, spending a lot of time thinking about and counting calories can sometimes be a sign that food is taking over your life in an unhealthy way. You should reach out to a healthcare professional if you are concerned that your relationship with food has become too restrictive.

Signs you're eating too little during maintenance

It’s not always obvious that you’re not eating enough, and not everyone who eats too little loses weight. It’s entirely possible to be malnourished at a healthy weight. So, it’s important to pay attention to certain signs that may indicate you’re not eating enough, like:

• constantly feeling hungry or, conversely, losing your appetite
• feeling tired and low in energy all the time
• feeling weaker and less able to engage in physical activities
• getting ill more often and taking a long time to recover
• feeling irritable
• having difficulty concentrating because you can’t stop thinking about food
• feeling cold all the time
• having a low mood or feeling depressed

It is crucial that you eat enough to give you energy and fuel a healthy, active lifestyle. If you relate to some of the signs above, you may need to eat more to help you feel adequately fueled.

Signs you may need to review your calorie intake

The number of calories you need to maintain your weight isn't set in stone. It's normal for your energy needs to change over time as your lifestyle, activity levels and health change.

It may be worth reviewing your calorie intake if you notice any of the following:

• Your weight is gradually increasing: This could be a sign that you're eating more calories than your body needs.
• You're less active than before: If your activity levels have dropped, you may need fewer calories to maintain your weight.
• You're continuing to lose weight: This may suggest that you're not eating enough to support maintenance.

That said, changes in weight aren't always caused by diet alone and can sometimes be linked to underlying health conditions. If you're concerned about unexpected weight changes, it's always best to speak to your GP or healthcare professional for advice.

Calorie needs if you're still taking weight loss medication

If you've lost weight with medication, working out how much you need to eat to maintain your weight can be more complicated. Your calorie needs don't exist in isolation. They can be influenced by your appetite, how full you feel after meals, and whether you're continuing or discontinuing your treatment.

Some people choose to stay on a maintenance dose to help manage hunger and support long-term weight maintenance. Others may gradually reduce or stop their medication. As treatment changes, you may notice changes in your appetite, cravings and food intake, which can affect how much you need to eat to maintain your weight.

Rather than focusing solely on calorie numbers, it's important to pay attention to your hunger and fullness cues alongside any ongoing effects of your medication. If you notice a significant change in your appetite after adjusting your treatment, speak to your clinician or healthcare professional for personalised advice.

Focus on food quality, not just calorie quantity

While calories play an important role in weight maintenance, the quality of those calories matters too. Two people can eat the same number of calories each day but have very different diets. For long-term health, it's important to focus not only on how much you eat, but also on what you eat.

A balanced diet should include:

• Slow-release carbohydrates to provide steady energy throughout the day, such as wholegrains, oats, wholemeal bread, brown rice and potatoes.
• Fibre to support digestion, gut health and fullness, including foods like vegetables, fruit, beans, pulses and wholegrains.
• Protein to help maintain muscle mass and keep you feeling satisfied, such as lean meat, fish, eggs, tofu, beans, nuts and seeds.
• Healthy fats to support overall health, including foods like olive oil, avocados, nuts, seeds and dairy products.
• Vitamins and minerals from a variety of colourful fruits and vegetables to help your body function at its best.

Staying well hydrated is important too. Drinking enough water throughout the day supports normal bodily functions, digestive health, and overall wellbeing.

"I often remind patients that weight maintenance doesn't necessarily depend on hitting a perfect calorie target every day. Your needs will naturally vary, and that's completely normal. The focus should be on building consistent habits, eating balanced meals, and learning to trust your body, rather than worrying about every calorie you consume."

Ayesha BashirPrescribing Pharmacist

If you'd like to learn more about building balanced meals and healthy habits, our guide to nutrition and diet during maintenance explores this in more detail.

Calorie needs may change over time

As you go through life, your body’s energy needs will naturally fluctuate. Many things can affect how much fuel your body requires, such as ageing or starting new medications.

Rather than assuming one single calorie target will work permanently, try to view weight maintenance as an ongoing relationship with your body. Regularly checking in with how you feel, how your clothes fit, and your general energy levels will help you stay on track.

A balanced maintenance phase

Weight maintenance isn't about chasing perfection or sticking to a plan every day. It's about understanding what your body needs, building habits you can realistically maintain, and giving yourself the flexibility to enjoy life along the way. The most sustainable approach is usually the one that feels balanced, practical, and achievable for the long term.

If you'd like a starting point for understanding your calorie needs, try our maintenance calories calculator to estimate the number of calories your body may need to maintain your current weight.

FAQs

How many calories do I need to maintain my weight?

There isn't one number that works for everyone. Your maintenance calories depend on factors such as your age, activity levels, body composition, and overall health.

Do I need to count calories to maintain my weight?

No. Some people find calorie tracking helpful, while others prefer a more intuitive approach. The best method is the one that feels sustainable and fits comfortably into your life.

Should I eat more calories after reaching my goal weight?

In many cases, yes. If you've been eating in a calorie deficit to lose weight, you'll usually need to increase your calorie intake to support weight maintenance. This doesn't mean undoing your progress, it's simply adjusting to your body's new needs.

Why do my calorie needs change after weight loss?

After losing weight, your body may need fewer calories than it did before. Changes in body size, activity levels, and metabolism can all influence how much energy you need each day.

Can I maintain my weight without tracking food?

Absolutely. Many people maintain their weight by focusing on consistent habits, regular meals, balanced nutrition, and paying attention to hunger and fullness cues rather than counting every calorie.

What are the signs that I'm not eating enough during maintenance?

Constant hunger, low energy, difficulty concentrating, feeling cold, irritability, or continued weight loss can all be signs that your body may need more fuel.

Do weight loss medications affect my calorie needs?

Weight loss medications can influence appetite, fullness, and eating habits, which may affect how much you eat during maintenance. If your treatment changes, it's worth paying attention to any changes in hunger and discussing them with your clinician if needed.

Will my maintenance calories stay the same forever?

Probably not. Your energy needs can change over time due to factors like ageing, changes in activity levels, health conditions, or medication use. Maintenance is an ongoing process of checking in with your body's needs and making adjustments when necessary.

Sources

• Calories and weight loss. (2025) NHS - Better Health. [Accessed 22 August 2026]
• Maintenance of lost weight and long-term management of obesity. (2019) National Library of Medicine. [Accessed 22 August 2026]
• Role of Physical Activity for Weight Loss and Weight Maintenance. (2017) National Library of Medicine. [Accessed 22 August 2026]
• Dietary advice for people taking weight loss medicines. (2025) NHS. [Accessed 22 August 2026]
• Reducing Calorie Intake May Not Help You Lose Body Weight. (2017) Perspectives on Psychological Science. [Accessed 22 August 2026]
• Malnutrition: causes and consequences (2010) PMC. [Accessed 22 August 2026]
• Malnutrition – Symptoms (2023) NHS. [Accessed 22 August 2026]