How Many Calories Per Day Should a Woman Eat?

Calorie needs are not one-size-fits-all. Several factors shape how many calories a woman needs each day:

• Basal Metabolic Rate (BMR): The calories your body burns at rest to keep basic functions running — breathing, circulation, cell repair. BMR is influenced by height, weight, age, and body composition (muscle burns more than fat at rest).
• Activity level: A sedentary desk-based day requires far fewer calories than a physically active one. Most estimates multiply BMR by an activity factor (sometimes called TDEE — Total Daily Energy Expenditure) to arrive at a maintenance figure.
• Age: Calorie needs generally decrease gradually with age as metabolic rate and lean muscle mass tend to shift over time.
• Weight goals: For weight loss, a common educational reference point is a deficit of around 500 calories per day below maintenance, which is broadly associated with a gradual rate of loss — though this is a general guide, not a personal prescription.

What changes on Mounjaro?

People taking Mounjaro (tirzepatide) commonly report a significant reduction in appetite and what is often described as a quietening of "food noise" — the persistent mental preoccupation with eating. This means many people on Mounjaro naturally eat considerably less than they used to, sometimes without consciously trying. While this can support weight loss, it also raises the question of whether intake remains sufficient in protein and key nutrients. Eating too little — particularly too little protein — can lead to loss of muscle mass alongside fat, which is worth being aware of and discussing with your prescriber or doctor.

How many calories per meal?

If you are eating three meals a day, a rough starting point for calorie distribution might be 400–600 calories per meal, with room for snacks if needed — but individual appetite, meal timing, and GLP-1-related fullness all shift this considerably. Many people on GLP-1 medicines find they naturally move towards fewer, smaller meals. There is no single correct number; the aim is to meet your daily total in a way that suits your appetite and supports adequate protein intake.

For a broader look at how daily calorie targets work in general, or to explore how to count and track calories effectively, those guides cover the fundamentals in more detail. You can also find a fuller breakdown in our calorie calculator hub.

Working out calories manually every day — especially when appetite is unpredictable on a GLP-1 medicine — can feel like a chore. GLP Trackr's AI food photo scan is designed to take most of that effort away: point your phone camera at your plate and the app estimates calories, protein, and macros instantly, without typing a thing. For packaged foods, the barcode scanner fills in the details in seconds.

Once your daily calorie and protein targets are set in the app, every logged meal counts toward them automatically. You can see at a glance whether you are hitting your protein goal — particularly important on Mounjaro, where reduced appetite can make it easy to under-eat on protein without realising. The daily check-in also captures how your hunger and energy feel each day, which builds a useful picture over time.

You can review logged meals and calorie trends alongside your weight data in the app's insights view — helpful for spotting patterns and for bringing a clear summary to conversations with your prescriber. For more on using calorie data alongside your GLP-1 journey, visit our guide to understanding calorie counts or the calorie calculator hub.

Calorie targets are general educational tools, not a substitute for personalised guidance. If you are unsure what intake level is right for your health history and goals, your prescriber or doctor is the right person to advise you.

Ready to take the guesswork out of food tracking? Download GLP Trackr on the App Store or Google Play and start a free 7-day trial — snap your meals, set your targets, and let the app keep count for you.