What Determines Your Recommended Daily Calorie Intake?
Your daily calorie requirement — sometimes called your Total Daily Energy Expenditure (TDEE) — is the number of kilocalories your body uses in a day. It is shaped by several factors, and there is no single figure that suits everyone.
The main factors involved
- Basal Metabolic Rate (BMR): the energy your body uses at complete rest to keep basic functions running. It accounts for the largest share of daily calorie use for most people.
- Activity level: movement — both structured exercise and everyday activity like walking or standing — adds to your daily total significantly.
- Body composition: muscle tissue uses more energy than fat tissue at rest, so two people of the same weight can have meaningfully different calorie needs.
- Age and sex: metabolic rate tends to decrease gradually with age, and average needs differ between biological sexes.
General reference ranges
Broad population estimates suggest daily needs of roughly 2,000 kcal for the average adult woman and around 2,500 kcal for the average adult man — figures referenced in general nutritional guidance. However, these are population averages, not personal prescriptions. Your own figure depends on the factors above and, if you are working toward a health goal, on the approach you have agreed with your prescriber or a dietitian.
How GLP-1 medicines affect appetite and intake
Many people taking Mounjaro or Wegovy report a noticeable reduction in appetite and food noise. This can make it easier to eat less — but it also increases the risk of not eating enough, particularly of protein and key micronutrients. Tracking what you actually eat against a sensible daily target helps you stay on the right side of that balance. For a deeper look at how daily intake figures are calculated, see our guide to daily calorie intake guidance, and for a broader overview of what kilocalories mean in everyday terms, the page on understanding kcal is a useful starting point. You can also explore related intake guidance at recommended kcal intake.
average weekly weight change in the first 16 weeks of Mounjaro & Wegovy use*
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Knowing your target is only useful if you can see how your actual intake compares to it day by day — and that is where logging in the app makes a real difference.
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GLP Trackr's AI food scan lets you point your camera at a meal and get an instant calorie and macro breakdown, no manual entry needed. When appetite is low and meals are smaller, the last thing you want is a complicated logging process. The photo scan handles the numbers so you can focus on eating well. A barcode scanner and manual search are there for packaged foods and anything the camera does not catch.
Set a daily calorie target and watch it in real time
You can set a personal daily calorie target inside GLP Trackr and track your running total throughout the day. The app also lets you set a protein goal alongside it — important on a GLP-1 medicine, where preserving muscle is a key part of the journey. Your calorie calculator hub has more on how to work out the right numbers to aim for.
If you are unsure what daily calorie target is right for your situation, speak with your prescriber or a registered dietitian — they can give personalised guidance based on your full health picture. GLP Trackr helps you track what you eat against whatever target you and your healthcare team agree on; it does not replace their advice.
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Frequently asked questions.
General nutritional guidance suggests roughly 2,000 kcal per day for the average adult woman and around 2,500 kcal for the average adult man, but these are population averages. Your personal figure depends on your age, activity level, body composition, and any health goals agreed with your prescriber or dietitian.
Many people taking these medicines experience a reduced appetite, which often means they eat less naturally. Your overall calorie needs are shaped by your body and activity level, not the medicine itself. It is worth ensuring you still meet protein and nutrient needs — your prescriber or a dietitian can help you set an appropriate daily target.
Your daily calorie target depends on your basal metabolic rate, activity level, age, and goals. Online TDEE calculators can give a general estimate. For a personalised figure — especially while on a prescribed weight-management medicine — discuss it with your prescriber or a registered dietitian.
GLP Trackr lets you set a daily calorie target and log meals using an AI photo scan, barcode scanner, or manual search. Your running total updates throughout the day so you can see at a glance how your intake compares to your goal. A 7-day free trial is available on the App Store and Google Play.
Reduced appetite on GLP-1 medicines can sometimes make it easy to under-eat, which may affect muscle mass and nutrient intake. Tracking daily calories and protein helps you stay aware of your intake. If you are concerned about eating too little, speak with your prescriber or a dietitian for personalised guidance.