What Calorie Deficit Do You Need to Lose 2 Pounds a Week?

The widely used estimate is that roughly 3,500 kcal of deficit equates to approximately 1 lb (0.45 kg) of fat loss. Scale that up and a 7,000 kcal weekly deficit — around 1,000 kcal per day — maps to roughly 2 lb a week. For a more modest target, understanding exactly what deficit aligns with a 2 lb goal is worth exploring in detail, since individual metabolism, lean mass, and hormonal factors all shift the number in practice.

Why the maths is a starting point, not a guarantee

Real weight loss is rarely perfectly linear. Water retention, muscle gain, hormonal cycles, and changes in activity all cause the scale to fluctuate week to week. Many people find that early weeks show faster movement as the body sheds water weight, followed by a slower, steadier pace — which is entirely normal and not a sign that something has gone wrong.

What about losing 1 pound a week instead?

A daily deficit of around 500 kcal is the commonly cited target for losing approximately 1 lb per week. This gentler pace is often more sustainable for people who are already eating relatively little due to reduced appetite on GLP-1 medicines — and it leaves more room to hit protein and micronutrient targets. How large a calorie deficit is right for weight loss covers this range in more depth. If you are unsure which pace is appropriate for you, your prescriber or doctor is the right person to ask.

Protein: the number that matters alongside calories

On a GLP-1 medicine, total food intake often drops significantly. When calories fall, protein becomes especially important — it helps preserve lean muscle mass, supports satiety, and tends to be more thermogenic than fat or carbohydrate. Most general guidance suggests aiming for at least 1.2–1.6 g of protein per kg of body weight when in a meaningful calorie deficit, though individual needs vary. What a calorie deficit actually means day to day is a useful primer if you are new to tracking your intake.

Knowing your target deficit is one thing; consistently hitting it — especially when appetite is unpredictable on a GLP-1 medicine — is where most people need practical support. GLP Trackr's AI photo scan lets you log a meal in seconds: point your camera at your plate and the app estimates calories, protein, and macros without you needing to weigh or search every ingredient. On low-appetite days when food feels like an afterthought, that speed removes the friction that causes tracking to slip.

Once your daily calorie and protein targets are set inside the app, the food log shows in real time how close you are to your numbers — so you can see at a glance whether you have room for a snack or whether you have already hit your protein goal for the day. The weekly progress charts then connect your intake patterns to your weight trend, giving you a clearer picture of what is actually working over time.

You can also explore the calorie deficit hub for a fuller guide to managing your energy intake on a GLP-1 journey.

GLP Trackr is a tracking tool, not a medical service. The numbers it provides are for personal reference and self-monitoring. If you have questions about the right calorie target for your situation — especially if you have a medical condition or are taking other medicines — always check with your prescriber or doctor before making significant changes to your diet.

Ready to put a number to your daily intake and watch your deficit add up? Download GLP Trackr on the App Store or Google Play — your first 7 days are completely free.