How to Lose Belly Fat in 23 Weeks: A Realistic Six Month Plan

• Twenty-three weeks at the deficit UK guidance recommends produces about 27.6 pounds of fat, which is almost exactly 2 stone.
• Waist circumference is the practical marker for belly fat, and the trials report it directly.
• Six months is long enough that your intake needs recalculating as you get lighter, which is where most plans fail.
• Treatment suitability depends on an individual clinical assessment with a UK registered prescriber.

Six months is a much more realistic timeframe for changing your weight and waist than trying to lose a large amount of belly fat in a few weeks. It gives you time to build habits, adjust your routine and make changes without relying on an extreme diet.

The NHS gives around 600 calories a day as an example of a calorie reduction that can support steady weight loss. It also advises aiming for around 1 to 2 pounds of weight loss a week, although the right rate varies between people.

If you maintained a 600 calorie daily deficit for 23 weeks, the theoretical energy deficit would be around 96,600 calories. However, this does not mean you will definitely lose 27.6 pounds of body fat. Weight loss is not perfectly linear, and your energy needs can change as your weight changes.

That is one of the biggest challenges with a six month plan. The calorie intake that creates a particular deficit at the start may create a smaller deficit later as your body weight changes. 

The good news is that you do not need to make the plan more extreme every time progress slows. Reviewing your food intake, activity, sleep and overall routine can help you understand what is happening.

Regular physical activity can support weight management and has benefits beyond weight loss. This includes aerobic activity and strength exercises, which can help maintain muscle and improve physical fitness. A balanced diet that includes protein, vegetables, fruit, wholegrains and healthy sources of fat can also make a longer weight loss plan easier to follow.

Key things to know

• A 600 calorie daily reduction is an NHS example for supporting steady weight loss, not a target that is suitable for everyone.
• Over 23 weeks, a 600 calorie daily deficit would create a theoretical deficit of around 96,600 calories. Actual weight loss will vary.
• Aiming for around 1 to 2 pounds of weight loss a week is the general NHS advice for steady weight loss.
• NICE recommends keeping your waist to less than half your height, using waist to height ratio as a useful measure of central adiposity.
• You cannot specifically target belly fat. Overall weight loss may reduce abdominal fat, but your body decides where fat is lost first.
• Your calorie needs may change as your weight changes, so the same diet may not produce the same rate of weight loss throughout six months.
• Results vary between individuals, and a six month plan should focus on sustainable habits rather than a guaranteed number on the scales.

How much belly fat can you lose in 23 weeks?

There is no single amount of belly fat that everyone can lose in 23 weeks. Your starting weight, calorie intake, activity, age, health, medicines and other factors can all affect the result.

The NHS recommends aiming for steady weight loss of around 1 to 2 pounds a week. Over 23 weeks, that would work out to roughly 23 to 46 pounds if that rate were maintained throughout. In practice, weight loss often slows over time, so this should not be treated as a promise or a target that everyone should try to reach.

These are mathematical estimates, not predictions of actual fat loss. Your body uses energy in different ways as your weight changes, and not every pound lost from the scales is body fat.

The arithmetic behind six months

You may see the figure of 3,500 calories used online to estimate the energy equivalent of one pound of body fat. It can be useful as a simple calculation, but it is only an estimate.

Your body is not a calculator. As you lose weight, your energy needs can change, and factors such as activity, muscle mass and changes in appetite can affect your progress.

That is why it is better to use calorie calculations as a rough guide rather than expecting the scales to follow a precise mathematical formula every week.

How to lose 2 stone of belly fat in 6 months

Two stone is 28 pounds. Losing that amount over six months would require an average loss of around 1.2 pounds a week.

That is within the general NHS range of around 1 to 2 pounds a week, but it does not mean everyone can or should aim for exactly 2 stone. Your starting weight and individual circumstances matter.

It is also important to remember that you cannot choose to lose exactly 2 stone from your stomach. If you lose weight, fat may come from different areas of the body, and the order can vary between people.

How to lose 3 stone in 6 months

Three stone is 42 pounds. Losing that amount in 23 weeks would mean averaging around 1.8 pounds a week.

That sits close to the upper end of the general NHS range, but whether it is appropriate depends on your starting weight and health. It should not be used as a universal target.

Trying to force faster weight loss by eating very little can make it harder to get enough nutrients and may not be sustainable. NICE recommends that very low energy diets providing fewer than 800 calories a day are only used in specialist weight management services for specific clinical reasons, with appropriate support and supervision.

The six month plan, phase by phase

Six months can sound like a long time, but breaking it into smaller stages makes the process easier to manage. Each stage has a different focus, and the goal is to build a routine that can continue after you reach your target.

Weeks 1 to 4: establish

Start by getting a clear picture of what you normally eat and drink. You do not have to change everything at once.

If calorie counting works for you, tracking your food for a while can help you understand portion sizes and where extra calories may be coming from. The NHS also recommends looking at portion sizes and making healthier food choices rather than relying only on calorie counting.

Measure your waist at the start if you want to track changes, and weigh yourself under similar conditions. Daily weight can move up and down, so looking at the weekly trend is more useful than focusing on one reading.

Weeks 5 to 12: hold

This is where consistency becomes more important than perfection.

You do not need to change your diet every time your weight moves slightly. Water, salt intake, digestion, activity and other factors can all affect your weight from week to week.

Instead, look at your progress over several weeks. If your weight has genuinely stopped changing, review your portions, drinks, snacks and activity before making a major change.

Weeks 13 to 20: adjust

By this stage, you may weigh less than you did at the start. That can mean your body uses fewer calories than it did before.

If your progress has slowed, look at your overall routine rather than immediately cutting out more food. You could review your portions, increase your everyday movement or add strength training if it is suitable for you.

If you are finding the process difficult or have a medical condition that affects your weight, speak with a GP, pharmacist or dietitian for individual advice.

Weeks 21 to 23: transition

As you get closer to your target, start thinking about what happens next.

You do not want your entire plan to depend on constantly eating less. Maintenance means finding an eating and activity pattern that helps you stay around your new weight.

Keep the habits that have worked for you, including regular movement, balanced meals and sensible portions. If you are taking a weight management medicine, do not stop it without discussing this with your prescriber.

Diet plan to lose belly fat in 6 months

A six month diet does not need to be six months of chicken, salad and saying no to every meal out.

The most useful plan is one that helps you reduce your calorie intake while still allowing you to eat a varied, enjoyable diet.

1. Look at your usual food and drink intake and identify where you can make realistic changes.
2. Include a source of protein in your meals, such as fish, eggs, lean meat, beans, lentils, tofu or yoghurt.
3. Include plenty of vegetables and fruit, along with other fibre rich foods.
4. Keep carbohydrates such as potatoes, rice, pasta and wholegrain bread in your diet unless a healthcare professional has advised otherwise.
5. Watch liquid calories. Sugary drinks, sweetened coffees and alcohol can add calories without making you feel as full as solid food.
6. Include healthy sources of unsaturated fat, such as olive oil, nuts, seeds and oily fish, while keeping portions sensible.
7. Leave room for foods you enjoy. A plan that allows some flexibility is often easier to maintain over six months.

Protecting muscle across six months

When you lose weight, some of the weight lost can come from lean tissue as well as fat. Eating enough protein and doing resistance training can help support muscle maintenance, although neither can guarantee that all weight lost will come from fat.

There is no single protein intake that is right for everyone. Your needs can depend on your body size, age, activity level and health.

Rather than focusing only on a number such as 0.8 grams of protein per kilogram, aim to include a protein source regularly throughout the day. If you have kidney disease or another condition that affects your diet, speak with a healthcare professional before increasing your protein intake.

Strength training at least twice a week is also part of UK physical activity guidance for adults.

Workout plan to lose belly fat in 6 months

Exercise cannot specifically remove fat from your stomach, but regular activity can support weight management, fitness and overall health.

Across six months, the goal is not to exercise as hard as possible. It is to build a routine that you can keep doing.

What UK activity guidance recommends

The UK Chief Medical Officers recommend that adults aged 19 to 64 aim for at least 150 minutes of moderate intensity activity each week, or 75 minutes of vigorous intensity activity, alongside muscle strengthening activities on at least 2 days a week.

The guidance also recommends reducing long periods of inactivity and breaking them up with movement.

You do not have to reach the full amount immediately. If you are currently inactive, starting with shorter walks and gradually doing more can be a sensible approach.

How to progress across 23 weeks

• Weeks 1 to 4: Start with regular walking and build towards 150 minutes of moderate activity a week if suitable for you.
• Weeks 5 to 12: Add two whole body resistance sessions a week.
• Weeks 13 to 20: Continue with two strength sessions and increase your activity gradually if you feel comfortable.
• Weeks 21 to 23: Focus on keeping the routine consistent rather than constantly adding more exercise.

Bodyweight exercises, resistance bands or weights can all be used for strength training.

If you have joint problems, a long term health condition, are pregnant, or have not exercised for a long time, speak with a healthcare professional about the most suitable way to become more active.

Why abdominal exercises do not remove abdominal fat

Doing more sit ups does not tell your body to remove the fat covering your stomach.

Abdominal exercises can strengthen your core, which may help with posture and physical function. However, the fat stored around your abdomen can only be reduced as part of overall fat loss.

Weight loss injections and six month results

If you are considering weight loss injections, it helps to look at the evidence over the same sort of timeframe you are planning for yourself.

These medicines are used alongside dietary and lifestyle changes, and the clinical trials that studied them lasted much longer than six months.

Sleep, stress, alcohol intake and your overall eating pattern can also affect weight management. Getting enough sleep and managing stress may make it easier to follow a healthy routine, but they should not be presented as ways to specifically burn belly fat.

Staying hydrated is important for normal body function, but drinking extra water does not directly burn abdominal fat. Similarly, fibre can help with fullness and digestive health, but it does not specifically remove belly fat.

What the licences say at six months

For some weight management medicines, treatment is reviewed after a period of use to check whether it is helping and whether it remains appropriate.

For semaglutide and tirzepatide, the relevant product information includes a six month review point after reaching the highest tolerated dose. If at least 5% of initial body weight has not been lost by then, the prescriber should reassess whether continuing treatment is appropriate.

This is a review point, not a promised result. Individual response can vary.

If you are considering treatment, the prescription weight loss treatments page explains the available options.

What the trials measured at the waist

Clinical trials have also measured changes in waist circumference, which is useful when discussing abdominal fat. However, the results below were measured after much longer treatment periods than six months.

These are average results from separate clinical trials, not a prediction of what one person will experience. Both studies also included lifestyle intervention, and the treatment periods lasted longer than six months.

The main weight loss results were also measured over these longer periods. In SURMOUNT 1, average weight loss with tirzepatide 15 mg was 20.9% at 72 weeks.

In STEP 1, average weight loss with semaglutide 2.4 mg was 14.9% at 68 weeks. These figures should not be used to estimate six month or individual results.

There is more information about the oral route on the page covering weight loss tablets.

Who these medicines are licensed for

The exact eligibility criteria depend on the medicine and its licence.

Some medicines and UK guidance also use lower BMI thresholds for certain ethnic groups because health risks can occur at a lower BMI. The specific criteria depend on the medicine and clinical pathway.

Treatment suitability depends on your individual health, medical history, current medicines and other factors. A qualified prescriber should assess whether treatment is appropriate for you.

Does it differ for women, men and people over 40?

The basic approach is similar, but there is no single calorie target or six month result that applies to everyone.

Your age, body size, activity level, health, medicines and other factors all affect your energy needs.

How to lose belly fat in 6 months for women

The NHS gives an average daily energy recommendation of around 2,000 calories for women, although individual needs can be higher or lower.

Hormonal changes and the menstrual cycle can also affect fluid levels and the number on the scales. This can make short term progress harder to judge.

If you are pregnant, breastfeeding, have irregular periods or have a history of an eating disorder, speak with a healthcare professional before making significant changes to your diet or exercise routine.

How to lose belly fat in 6 months for men

The NHS gives an average daily energy recommendation of around 2,500 calories for men, but this is only a population average. Your individual needs may be quite different.

The same principle applies: aim for a manageable calorie deficit rather than trying to lose as much weight as possible.

If your weight is not changing despite consistent efforts, or you have concerns about your health, speak with your GP or another qualified healthcare professional.

How to lose belly fat in 6 months over 40

Turning 40 does not suddenly change how weight loss works. However, muscle mass can decrease with age, which is one reason strength training becomes an important part of staying strong and physically active.

Rather than focusing only on the number on the scales, consider your waist measurement, strength, fitness and how your clothes fit.

If you have developed a new health condition or started taking medicines that may affect your weight, speak with your GP or pharmacist.

How to lose belly fat and keep it off

Losing weight is one part of the process. Keeping it off is where your long term habits really matter.

This is particularly important if you are using weight management medicine, because research has found that weight regain can occur after treatment is stopped.

What happens when treatment stops

In an extension of the STEP 1 trial, a group of participants was followed for another year after semaglutide treatment stopped. At week 120, the semaglutide group had regained a substantial amount of the weight they had lost. Their average weight remained 5.6% below their starting weight, compared with 0.1% below baseline in the placebo group.

Another study, SURMOUNT 4, looked at what happened when tirzepatide was continued or replaced with placebo after an initial 36 weeks of treatment. Participants who switched to placebo regained a substantial amount of weight, while those who continued treatment maintained and increased their weight loss.

These studies do not mean that everyone will regain the same amount of weight. They do show why it is useful to have a long term maintenance plan and to discuss any treatment changes with your prescriber.

What a sustainable plan looks like after month six

• Keep eating a balanced diet that suits your new weight and activity level.
• Continue regular physical activity, including strength training if it is suitable for you.
• Keep an eye on your weight and waist without becoming overly focused on daily changes.
• If your weight starts increasing consistently, look at your routine early rather than waiting for a large change.
• If you are taking a weight management medicine, speak with your prescriber before stopping or changing treatment.
• Give yourself some flexibility. One meal or one difficult week does not undo six months of progress.

If you want ongoing clinical support rather than managing everything alone, the weight loss clinic pages explain what assessment and follow up can involve.

Medical Disclaimer

This article is for general information and does not replace advice from a qualified healthcare professional. No dosing instruction should be taken from it. Prescription medicines should only be used under the supervision of an appropriately qualified prescriber, and suitability depends on an individual clinical assessment.

If you have a medical condition, take regular medicines, are pregnant or breastfeeding, or have a history of an eating disorder, speak with your GP, pharmacist or another qualified healthcare professional before making significant changes to your diet or activity levels.

Results vary between individuals. If you have unexplained weight changes, persistent abdominal swelling, abdominal pain or other symptoms that concern you, seek medical advice.