How Much Calories Should I Eat Daily on a GLP-1 Journey?

Your daily calorie need is essentially your maintenance level (the calories your body burns in a day) minus a deficit if your goal is weight loss. Maintenance is usually estimated from your basal metabolic rate plus an activity multiplier — a number known as TDEE (total daily energy expenditure). It's an estimate, not a precise prescription, and individual variation is large.

General ranges (educational, not personal)

As a broad reference, typical daily calorie ranges for women sit around 1,600–2,400 depending on age and activity, and for men around 2,000–3,000. Older adults and less active people tend toward the lower end; younger, more active people toward the higher end. These are population averages — your own number can sit outside them.

How much is 1 kg of body fat in calories?

Roughly 7,700 calories is the figure widely used for 1 kg of body fat. That means an average daily deficit of about 500 calories below maintenance maps to somewhere around 0.45 kg (1 lb) of fat loss per week in theory — though in practice water shifts, glycogen, muscle changes and individual metabolism make weekly numbers bounce around. If you want to dig into this further, the calorie deficit hub walks through it in detail.

Factors that change your number

• Body size and composition — more lean mass usually means a higher maintenance level.
• Age — needs generally drift down with age.
• Activity — formal exercise plus everyday movement (NEAT) both count.
• Hormones, sleep, stress, illness — all nudge the number around.
• Current weight and weight-loss history — people who have already lost weight often have a lower maintenance than the equations predict.

Quick ways to estimate your own number

A simple starting estimate is to multiply your body weight in kg by a number between 22 and 35 depending on activity (sedentary toward the bottom, very active toward the top). For a more structured approach, the calorie estimator and calorie calculation tool step you through the inputs, and the calorie counter guide covers how to track once you've got a target.

What 'should I burn a day' usually means

When people ask how many calories they should burn in a day, they're usually asking about TDEE — your total daily energy expenditure, which already includes everything from breathing to walking the dog to a workout. There's no single 'correct' burn target; the useful number is how it compares to what you eat. The calories explainer and the deeper how much should I eat page unpack this.

What changes on Mounjaro or Wegovy

Appetite-regulating effects on GLP-1 medication (and the dual GIP/GLP-1 action of tirzepatide) mean many people naturally eat less without trying — the issue often flips from 'how do I eat less' to 'how do I make what I eat count.' That usually means a protein-forward plate, hydrating well, and not skipping meals altogether, even when food noise is low. Practical food choices and structure are covered in the meal plan for weight loss guide and the wider diet plan and weight-loss diet resources, with a tailored version in the weight-loss diet plan page. Suitability and any specific numeric targets are a conversation for your prescriber or doctor, who knows your full history — including anything around pancreatitis or other relevant background. For the medicine itself, the Mounjaro overview and 5 mg dose page give the factual background. The NHS Eatwell guidance is a solid neutral reference for the underlying nutrition principles.

The honest answer most people need isn't a more precise number — it's a system that makes hitting a reasonable number effortless, especially on weeks when appetite is low and remembering to eat enough protein is the actual challenge. That's where the app comes in.

Photo-scan food logging

The fastest way to know what you've eaten is to snap a photo of your plate — GLP Trackr's AI food scan reads the meal and breaks it down into calories, protein and macros in seconds. For packaged food, a barcode scan does the same. It's built for the reality of GLP-1 life: meals are smaller, less repetitive, and you don't want to type out every bite.

Targets that actually fit you

Set your daily calorie target and a protein goal in the app, and the daily view shows where you are at a glance. Many people on Mounjaro or Wegovy find the protein number is the one to watch — calories often look after themselves when appetite is reduced, but protein needs deliberate planning. If you'd rather start from numbers, the calorie estimator can pencil in a starting target you can adjust over time.

Insight without obsession

Logging a few weeks of food alongside your weight, mood and energy gives the app enough to surface patterns — for example, days where lower protein lines up with lower energy, or weeks where your average calories drifted higher than you realised. The aim isn't to count forever; it's to learn what your version of 'enough' actually looks like, then loosen the reins.

Where the medical line sits

The app is a tracker and a companion, not a prescriber. Any specific calorie target tied to your medication, your health conditions, or a notable weight change should be agreed with your prescriber or doctor — they can factor in your full history in a way no calculator can. If something feels off (very low intake for days on end, persistent symptoms, or anything worrying), please contact your healthcare professional rather than relying on numbers alone. For the wider picture, the calorie deficit hub ties calories, protein and progress together.

Ready to stop guessing? Point your camera at your plate, let GLP Trackr handle the maths, and watch your protein and calorie patterns come into focus. The app is free for 7 days on the App Store and Google Play — give it a week and see how much lighter tracking can feel.