What Maintenance Calories Actually Mean — and Why They Matter on GLP-1
Maintenance calories (sometimes called your caloric maintenance or total daily energy expenditure) represent the balance point: eat at this level and your weight stays roughly stable; eat below it and you create a deficit that drives fat loss; eat above it and weight tends to rise. For people on Mounjaro or Wegovy, this number becomes especially relevant because the medicines reduce appetite, making it easy to slip into a large deficit without intending to.
How the estimate is calculated
Most maintenance calculators — including the one on this page — start with your basal metabolic rate (BMR), which estimates the energy your body burns at rest, and then multiply it by an activity factor to account for movement. Common formulas used include the Mifflin-St Jeor equation, which is generally considered one of the more reliable approaches for adults. The result is an estimate, not a precise measurement; individual metabolism varies based on body composition, health status, medications, and other factors.
A useful starting point, not a prescription
Treat your maintenance number as a reference range rather than a rigid rule. Many people on GLP-1 medicines aim to eat in a moderate deficit below maintenance — but the right deficit size is something to discuss with your prescriber or a registered dietitian, not a number to chase aggressively. Eating too far below maintenance for too long can lead to muscle loss and fatigue, which is why tracking — rather than guessing — is so valuable.
If you want to explore related calculations, the weight reduction calculator can help you understand what a deficit looks like in practice, while our calorie calculator hub covers the broader picture of calorie needs on a GLP-1 journey. For a slightly different view of the same concept, see also the maintenance calories calculator and the maintenance calorie calculator pages.
Factors that affect your maintenance calories
- Body weight and composition: more muscle mass raises BMR, meaning you burn more at rest.
- Age: BMR tends to decrease gradually with age.
- Activity level: sedentary, lightly active, and highly active individuals can have maintenance levels that differ by several hundred calories per day.
- Weight loss itself: as body weight decreases, maintenance calories typically decrease too — so the number is worth recalculating periodically.
average weekly weight change in the first 16 weeks of Mounjaro & Wegovy use*
Tracking the right four numbers — weight, waist, protein and dose — turns a noisy chart into a clear story. That's the loop GLP-1 users keep coming back for.
AI Meal Tracking. Built for GLP 1 Appetites.
Point your camera at any meal and let our AI do the rest. Breakfast, doses, weight, mood all tracked in seconds.
Track Your Calorie Targets Automatically with GLP Trackr
Knowing your maintenance number is only useful if you can act on it consistently — and that is where a dedicated calorie maintenance app makes the difference. GLP Trackr's food logging feature is built around the reality of GLP-1 life: appetite is unpredictable, portions are smaller, and the last thing you want is a tedious manual entry process.
The fastest way to log a meal is the AI photo scan — point your phone camera at your plate and get an instant breakdown of calories, protein, and macros without typing a thing. For packaged foods, the barcode scanner works just as quickly. Both feed directly into your daily calorie target, so you can see at a glance whether you are on track relative to your maintenance estimate or your chosen deficit.
Beyond food logging, GLP Trackr lets you set a calorie target (and separate protein, water, fibre, and steps targets) that appear in your daily check-in. The insights dashboard then surfaces patterns over time — for example, whether days you hit your protein goal tend to coincide with better energy or steadier weight. That kind of personal-data picture is hard to build in a general-purpose app and genuinely useful to bring to a conversation with your prescriber or dietitian.
A practical note: GLP Trackr is a tracking and journaling tool. It does not provide medical or nutritional advice, and any decisions about specific calorie targets or dietary changes are best made with your healthcare professional, who knows your full history.
Ready to put your maintenance number to use? Download GLP Trackr on the App Store or Google Play — your first seven days are completely free, no commitment needed.
What does glptrackr include?
10+ powerful features. One app. Built specifically for Mounjaro and Wegovy users.
Everything your GLP-1 journey needs. Free to try for 7 days.
Morning Check-In
Start every day with a 60-second wellness check-in. Log how you're feeling, track nausea, appetite, energy, and mood — giving you and your care team a complete picture of how your medication is working.
Injection Tracking
Log every dose with a single tap. Track your dose history, phase in your cycle, estimated medication levels, and upcoming injection dates — with reminders so you never miss a scheduled shot.
Hydration Reminders
Staying hydrated is especially important on GLP-1 medications. Set daily water targets, log intake throughout the day, and receive smart nudges when you're falling behind your goal.
Smart Meal Planning
Personalized meal plans built around your current dose phase and side effects. Every meal is GLP-1 optimized — high in protein, gentle on the stomach, and scaled to your reduced appetite.
Recipe Library
Browse 50+ high-protein, GLP-1-friendly recipes filtered by meal type, prep time, and dietary needs. Every recipe includes full nutrition info, step-by-step instructions, and tips for eating with side effects.
Progress Analytics
Beautiful, easy-to-read charts show your weight loss trajectory, weekly nutrition trends, medication responses, and wellbeing scores over time — turning raw data into genuine insights.
AI Meal Scanning
Snap a photo of any meal and get a full nutrition breakdown in seconds — calories, protein, carbs, fat, and fibre. No searching. No manual logging. Just point, snap, and track.
Exercise & Steps
Log walks, workouts, and movement with activity targets that flex with your energy levels. On lower-energy dose days, gentler targets keep you moving without burning out.
Community Support
Connect with thousands of others navigating the same medication journey. Share milestones, ask questions, find accountability partners, and get support from people who truly understand.
Never Forget a Dose Again.
Log your Mounjaro or Wegovy injection in seconds. Track your pen, your dose level, and your injection site — so you always know exactly where you are in your treatment.
Watch Your Body Transform, Week by Week.
Log your weight, measurements, and how you're feeling after each dose. GLPTrackr turns your data into clear, motivating charts that show you how far you've really come.
You're Not on This Journey Alone.
Connect with thousands of real GLP-1 users sharing their wins, side effect tips, and meal ideas. Get the support of people who truly get it — because they're living it too.
Download on the App Store Download on the Google Play
Founding Member Offer
One plan. Everything included. No hidden extras.
Founding Member
Exclusive Offer
Join the first 1,000 membersand lock in our lowest ever price
Offer expires in:
786 of 1000 founding spots remaining
50% OFF
Lifetime Price Lock
Never pay full price • Forever
🔒 No credit card required • Cancel anytime
Premium
Ad-free- Track weight, meals, water, exercise, & sleep
- Log doses, injection sites, & side effects
- 60-second daily morning check-in
- AI meal scanning & barcode scanning
- Personalised AI meal plans & recipes
- Golden Dose Finder AI
- Medication Clock — real-time level tracking
- Daily Brief and predictive side effects
- Full insights & weekly transformation cards
- Unlimited progress photos
- Doctor PDF export & body measurements
- Community Access—Connect with GLP-1 users
Powered by
🔒 No credit card required • Cancel anytime
The Most Advanced GLP-1 Brain Ever Built.
The first AI built exclusively for GLP-1 weight loss. Every insight, every meal plan, every prediction trained on one thing only: helping you get the most out of your medication.
Knows Your Cycle
GLPIQ tracks where you are in your injection cycle and adjusts everything around it: lighter meals on nausea days, higher protein when appetite returns, and smarter targets as your medication level shifts.
Predicts Before You Feel It
GLPIQ learns your personal side effect patterns over time. After a few cycles, it starts warning you the morning before a rough day — and adjusts your meal plan automatically.
Finds Your Golden Dose
GLPIQ analyses every dose you've been on: weight loss rate, side effects, food noise, mood, protein adherence and tells you which dose gave you the best results. No other app does this.
Download glptrackr today.
Available on iOS and Android. 7-day free trial, no credit card needed.
Frequently asked questions.
Maintenance calories are the number of calories you need each day to keep your weight stable — your total daily energy expenditure. Eating below this creates a deficit that can lead to weight loss; eating above it tends to lead to weight gain. The figure is an estimate and varies by individual.
Most calculators estimate maintenance calories by first calculating your basal metabolic rate (BMR) using your height, weight, age, and sex, then multiplying by an activity factor. The result is a useful starting point, but individual metabolism varies, so treat it as a guide rather than a fixed number.
Yes — as your body weight decreases over time, your maintenance calorie estimate typically decreases too, because a lighter body generally requires less energy at rest. It is worth recalculating your maintenance figure periodically as your weight changes throughout your journey.
The right deficit size is an individual question best discussed with your prescriber or a registered dietitian. Eating too far below maintenance for extended periods can affect energy and muscle retention, so tracking your intake and checking in with your healthcare professional is strongly recommended.
Yes. GLP Trackr lets you set a daily calorie target and log meals via AI photo scan, barcode, or search. Your intake is tracked against your target each day, and the insights dashboard highlights patterns over time — making it easy to stay consistent and informed.