How Many Calories Are Burned in a Day — and Why It Matters on a GLP-1 Journey

Your total daily calorie burn — sometimes called total daily energy expenditure (TDEE) — is made up of several components that add together in different proportions for every person.

Resting metabolism (the biggest share)

Even at rest, your body burns calories to keep organs functioning, maintain temperature, and carry out basic cell processes. This resting metabolic rate typically accounts for roughly 60–70% of total daily burn for most people, though the exact proportion shifts with age and body composition.

Movement and activity

Everyday movement — walking to the kitchen, climbing stairs, fidgeting — adds a surprisingly large amount on top of structured exercise. Formal workouts such as weight training, cycling, or swimming contribute further. The calories burned during weight training, for example, vary with session intensity and duration, and continue to have an effect afterwards as muscles recover. If you are curious about a more tailored estimate, see our guide on how to calculate calories burned.

Digestion

Breaking down and absorbing food uses energy too — roughly 10% of total intake for most eating patterns, though protein costs more to digest than fat or carbohydrate.

Why this matters on Mounjaro or Wegovy

GLP-1 medicines are commonly associated with reduced appetite and lower food intake. Many people on these medicines eat significantly less, which is often the goal — but eating too far below your energy needs over time can reduce muscle mass and make it harder to sustain progress. Understanding your average calories burned per day gives you a floor to aim at, not just a ceiling. For a deeper look at how energy balance works, our guide to calorie deficit covers the full picture. You may also find it helpful to understand what calories actually are and how they relate to weight — or explore how many pounds are in a calorie to put the numbers in context.

General educational ranges are a useful starting point, but they are not a personalised prescription. Your own burn will differ from any average, and any specific targets are best discussed with your prescriber or a registered dietitian who knows your full history.

Knowing your estimated calorie burn is only useful if you can compare it against what you are actually eating — and that is where effortless food logging makes a real difference.

GLP Trackr's AI food photo scan lets you point your camera at a meal and get an instant breakdown of calories, protein, and macros without manually searching for every ingredient. On a GLP-1 appetite, when meals are smaller and less frequent, the last thing most people want is a complicated logging process — a quick snap takes a few seconds and keeps your data accurate. You can also use the barcode scanner or manual search when photo scanning is not practical.

Alongside food logging, the app lets you set and track a daily step target, which feeds into your activity picture alongside your calorie data. The daily check-in captures your energy levels and other wellbeing markers, so you can see over time whether your intake and output feel balanced — useful information to bring to appointments with your prescriber.

GLP Trackr is available free on the App Store and Google Play, with a 7-day trial to explore all features. Snap your meals, hit your protein target, and watch how your intake compares to your energy needs — all in one place.