How Many Calories Should I Intake Per Day?

Your calorie requirement is shaped by several factors working together. Understanding them helps you interpret any number a calculator gives you, rather than treating it as a fixed rule.

Basal Metabolic Rate (BMR)

BMR is the number of calories your body uses at rest just to keep basic functions running — breathing, circulation, cell repair. It is the starting point for any calorie estimate and is influenced mainly by your body size, age, and body composition (muscle burns more at rest than fat).

Activity Level

On top of BMR, every movement you make — from structured exercise to simply walking around the house — adds to your daily calorie need. This combined figure is often called Total Daily Energy Expenditure (TDEE). Someone with a sedentary desk job has a notably lower TDEE than someone in a physically active role, even if their BMR is identical.

Sex and Hormonal Factors

On average, women have a lower BMR than men of the same age and weight, partly due to differences in muscle mass. This is why recommended calorie intake for women tends to sit at the lower end of general ranges. Hormonal changes — including those linked to the menstrual cycle, perimenopause, or menopause — can also influence energy needs over time. For a closer look at women's daily calorie needs, those factors are explored in more detail.

Weight Goal

Maintaining weight requires eating roughly in line with TDEE. A modest calorie deficit is generally associated with gradual weight loss, while a surplus supports weight gain. On a GLP-1 medicine, reduced appetite often creates a natural deficit — tracking what you actually eat helps you understand whether that deficit is within a sensible range, or whether intake has dropped so low that protein and nutrient needs may be at risk.

For a more personalised estimate, the calorie intake calculator on GLP Trackr walks through the key variables. You can also explore the broader topic of calorie management on the calorie calculator hub.

Knowing your target is one thing; consistently hitting it is another — especially when GLP-1 medicines can make appetite unpredictable from day to day. GLP Trackr's AI food photo scan is the most direct way to close that gap: point your camera at a meal and the app estimates calories, protein, and macros instantly, without manual entry.

Once your calorie target is set in the app, every logged meal feeds into a running daily total so you can see at a glance where you stand. If you are also tracking protein — important on a GLP-1 journey when appetite is reduced — the app's targets feature lets you set a separate protein goal alongside calories, so neither gets lost.

Over time, the insights section surfaces patterns from your own data: how your intake varies across the week, how it relates to your weight trend, and whether you are consistently hitting your goals or drifting. That kind of personal picture is far more actionable than a generic daily number.

A note on targets: the figures a calculator produces are general educational estimates. Your individual calorie needs depend on your full health picture, and any specific targets — particularly if you are managing a health condition alongside your GLP-1 prescription — are worth discussing with your prescriber or doctor before acting on them.

Ready to stop guessing and start seeing your intake clearly? Download GLP Trackr on the App Store or Google Play and explore it free for your first 7 days — no commitment needed.